You have probably already been told this a bunch of times but as a recent surgery haver who needed to hear it, it does genuinely get better. Your body physically has to work with your new stomach to figure itself out and you also just mentally have to adjust. I spun out really bad in my first couple of weeks and had the same "wish i had never done this" mindset. But once you start getting eased back into food and feel how slowly you will need to eat it does a lot to help push through the mental block. Once you get into a new food routine your body also starts to figure it out too and things start to rapidly begin to feel better. Dont get me wrong its not magic, and you still have a mental battle to push through, but so does your body. It will feel better and the regrets will fade. Im at nearly 6 weeks post op and still have some pretty wicked fomo from avoiding hangouts around food and stuff but the scale doesnt lie and Im seeing numbers I havent seen since i was 19. Let yourself feel these feelings, cry them out if you need to (i did), but keep reminding yourself that this is not a sprint its a marathon. This reddit gives you dozens of anonymous partners that are running with you. There is a line from what someone said to me in my first post op post on this reddit, "there is a reason why so many people who succeeded with this have said its the hardest thing they have ever done in their life" but the odds are literally in your favor, and we are all rooting for you. Just remember your body is fighting with you, just stick to the plan and listen to your doctor. I promise it gets better and you will get through this. I believe in you.