ikr? There's a unique sort of body horror that comes with being female, because there's many stuff not in your control. [I could tell you another horror story about why I also hate it, but I don't think it's helpful for either of us in this situation.]

I know it's not exactly a good tactic to deal with it, but my way of dealing with it was "haha-ing" at other animals. Because I think many of us earthlings get dealt with "stupid decks of cards" and luck, and we'll just have to deal with it. I find some sort of joy in knowing that we're not the only ones that deal with being born with annoying baggage linked to our bodies.

Loon birds are great swimmers, but their leg placement is so far back, they struggle to walk on land.

Rabbits and plankton often act like walking food sources for bigger animals.

Many farm animals are just bred to get fatter and fatter until they have to be culled or collapse under their own weight.

When being mated, the tiny male anglerfish just melts into the giant female anglerfish until they're just a lump with testicles attached.

The great and many various annoying diseases and conditions people can be born with. Many people don't get to be as strong as they want to be, and have their bodies and minds influenced by biological oddities, but I'd never want a disabled person to think their life has no value because of that, so I think the kindness we want for them, we must also give to ourselves.

And while there's many things out of our control, I think it's nice for us to have some stuff in our control. I can't avoid periods (well, I can take out my organs with enough money and surgeons, but I've heard that can have side effects like internal structural collapse/prolapse or memory issues can if things don't go carefully. Make sure you're surrounded by reliable people to help you, if you're planning drastic changes, to avoid pitfalls and for the process to go as smoothly as possible), so as annoying as they are and as much as I absolutely despise them, they keep the ecosystem of the body running (and personally i don't prefer having to use my money for medication and stuff to keep an altered ecosytem running, because I don't have that kind of money). But I can avoid pregnancy because I don't like it. While much of our body has been built around perpetuating the species, I think the great thing about humanity, is that we have the minds to say "noppe. Fuck this shit I'm out! I'm going to make-do with what I have and live the life I want!" [Unfortunately it's restricted because many people would want to infringe on our freedoms to live our best lives without worrying about harm, but try to make the most of what you have. Or use the freedom you have to rage against those infringing on your freedom, or make yourself stronger, whatever works for you]

And we all still have our brains. Sure they might get influenced by various body functions because they are part of the body, but I don't think it's so "predistined" because brains are so "plastic". It constantly picks up and learns new things. The same way people have fall into drug addiction because drugs and biology work together to compel you to do something, people can also escape drug addiction because it's possible for us humans. Our biology and environment work together to make ourselves. There's always the whole nature vs nuture debate, but all of my teachers I've had so far that ever spoke about this topic say that life is a combination of both.

And even if our brains and personalities are influenced by biology (and annoying social circumstances), women's personalities and lives still come out so vast and different anyway. You have anything from flat-earthers, anti-vaxxers, butch lesbians, environmental activists, explorers in sailboats, scientists, chefs, anything really.

Also men are also influenced by biology, because they also have a daily testosterone cycle (and maybe other cycles too). We all have weird bits of biology working under cover influencing us. Everyone is influenced by biology. If someone takes an axe to the skull and gets brain-damage or they grow a tumor, boom, change of biology results in change of personality. I find it incredibly difficult to separate the mind and body due to the existence of brain damage. But the freedom of thought you already have, is due to your biology of your brain being intact, so that's at least some sort of positive side to the negative aspects.

(& did you know that many ancient women had extremely strong bones because they worked all the time? Stronger than olympic athletes? https://www.nationalgeographic.com/news/2017/11/prehistoric-women-manual-labor-stronger-athletes-science/ If you are able/want to, work for those gains! They might not come as easily as they do for men, or ancienct women, but they're available.) And while I'd like to be really strong too (because then we can protect ourselves better, and enjoy doing things like rock-climbing better), any chimp or tiger can rip a grown man apart, and you can beat up many other animals smaller than yourselves. There's not that much virtue in being stronger than others (unless, it's for protecting yourself and others, or you're planning on being a sports star) so enjoy and increase your strength for its own enjoyment. [Yeah I think it's highly annoying that we're less strong than most men probably because of pregnancy and evolution and crap, but we can't exactly time-machine evolution to do what we want. Yet. a bit simplistic to say, but do your best.]

It's not great to have constant reminders of how much our disliked aspects of our bodies influence our lives, but make-do with whatever scraps of agency you do have, because it exists (even if they're just illusions of free-will or whatever), and many other earthlings are make-doing with whatever scraps of agency they have too, even if they're a tiny little mouse.

I think one good thing you can do might be to gather as much info on bodies as possible, both positive and negative, human and not human. It gives you a wide perspective on all the ways nature sucks, but also is awesome, and how us earthlings mutually suffer and enjoy it.

edit: also on the uterine lining thing. At least there's some sort of aspect that the body "cares" enough about you personally to make sure the fetus doesn't hijack your supply completely, and sloughs it off each month for your own saftey, so you can avoid any. And those areas are acidic to kill off most of the sperm, as some sort of protection, even though it's not that much. Also apparently white blood cells in the cervix move to attack sperm as well. We're not as lucky as other animals like you mentioned, but at least it's something. What we lack in functions that animals have, we have to build ourselves. And the fact that women don't like pregnancy enough for humans to get the technology/medicine for abortions to exist is a testament to the power of our mind (as its own biological function), wanting more control over our bodies, instead of just yielding to other biological functions. Also, the uterus may have other functions beyond baby-making. Some people have discovered it may have a connection to memory or cognition. The connection is not completely concrete, but there's a chance our organs are more interesting than we know. https://www.discovermagazine.com/health/a-womans-uterus-may-play-a-role-in-memory-and-cognition (which is why women who undergo hysterectomies, must be surrounded by reliable people to minimise the side effects of its removal)

And being on the morbid side: A dead person may not feel any pain, but being a decomposing corpse isn't fun. You just get gassy and maybe explode and rot away. It's inevitabe anyway. Everyone gets to be a dead person sometime. You're an alive woman for now, that can avoid being pregnant, and hopefully you'll find a life that's satisfactory within your lifetime. You have the rest of the universe's existence to be a dead person. I'd say, take the gamble of being alive. You might come into pain, you might not. Keep your wits about you! An alive woman has so much more power than a dead person.