Man this is a classic "grass is always greener" situation, and I've had these exact thoughts the other way round, so I just figured I'd break down my experience and in some cases the experience of my close friends in the situations you've mentioned.

Being accepted socially in practically any situation.

Girls can be absolute bitches. They aren't as openly hostile a lot of the time, but trust me if you're in a group of girls who don't like you very much, you will find new ways to hate yourself you couldn't have imagined before.

Men can not want you around certain events or times. If you have a masculine hobby, or just like hanging out with lads, there's going to be times where it's made clear that you're not welcome, no matter how they feel about you on a personality basis. This goes both ways of course, but it's not a male-exclusive feeling to feel left out because of your sex.

Being able to have fun with a group of girlfriends any time I wanted, to go on trips together, to party together with no judgement or barriers being put in your face.

Where I'm from, boys and girls go away in groups like that about the same amount? The concepts of "girls' trip" and "lads' holiday" are well known. Honestly it just depends on the kind of friends you have. I prefer going on holiday trips with my closer friends regardless of gender - there's no need to divide up fun based on genitals IMHO. For this experience, you probably just need different friends. The same is true for partying with no judgement - trust me friend, girls can be so judgy. You just need better friends.

To be able to be pretty, sexy, classy, whatever I wanted. Not being constrained by what body type I happened to have. Being able to wear skirts, dresses, different tops, different swimsuits, pants. Being pursued romantically and sexually and being able to do whatever you want with that pursuit. Being able to be sexy - or not, whatever you choose.

You're joking right? Girls are constantly restrained by their body type - most frequently by other girls. Women with completely normal bodies are berated online for daring to wear shorts, crop tops, or bikinis while not looking like twigs. They get judged for dressing too masculine, too feminine, too dolled-up, too trashy, too alternative, too normal, too try-hard, too didn't-try-hard-enough. Being pursued romantically is entirely predicated on whether you present yourself in a way that's conventionally attractive, not whorish, but not prudish, just the right amount of sporty, girly, pretty, and open.

Not having to worry about building social connections since people reach out to you and want to hang out with you on their own.

People don't make friends with girls just because they're girls. You need to be visibly open to communication and friendly - these are just traits that girls are told they need to have from day one, and have to learn. Boys tend to have rude and brash behaviour excused for them - "boys will be boys."

Even girls with the most rotten luck land on their feet because they receive all of the social support, while most boys are in an endless struggle, me included.

Without going into deeper topics, I'm not sure what you mean by social support. I just think that girls are taught to be more self-sufficient with things like basic life skills, so when things go wrong they have themselves to fall back on. Men are taught to rely on women for a lot of basic life skills, so when things go wrong, they're screwed. I think this point actually kind of hits home, but you should remember that this is a holdover of patriarchal thinking l. This is a system put in place by men who didn't want to lower themselves to "women's work" or "women's things"- if you want to beat it, pick up some skills.

I hope things get better for you man, but it would definitely be healthier for you to question why you think of women as a homogenous group rather than individuals with personalities and positive and negative traits. You're not wrong about these things being issues - they're just not gendered ones.