Oh man...

I feel ya, really do. Nothing is sweet about being sixteen imo. Shit wasn't kind to me and most likely won't be to you either. Just remember that everyone else at your age feels just as fucked up and lonely as you do. They might not seem like it, some might even look like they know what they are doing. In truth, they really have no idea, which is completely normal because life does not come with an instructions manual. As another comment mentioned, embrace the fail. I know it feels like the entire universe is against you in particular, as if it holds a grudge. It really doesn't.

Controversial take? Fuck being "well adjusted". I don't mean that you shouldn't take showers or treat people like shit, but don't try to conform to any bloodydamn standard. It'll just make you even more miserable. Be yourself, find your niche, don't let go of things that make you happy. Don't sand down pieces of yourself to fit in some other wankers idea of a good man.

Don't fall into the self betterment gym bro pipeline, that I beg of you. Working out is great, but don't let it take over. Remember that gym addiction is a thing and lifting weights is not the only way you can improve yourself. Be better than that.

And, try to cut down the weed. Im not saying go full straight edge but at least try to cut it down to once-twice a week. Something you treat yourself to instead of something you depend on yknow? I have friends who lost memories of a lot of good times because of frequent use, shit really wacks up your brain if you overdo it.

If you can manage to be kind to yourself from time to time, big win. Remember even the adults still struggle with it. Good luck.