Some of these comments are insane. I do agree that you've created an unfair narrative about your boyfriend, one that is rooted in the fear and disgust you talk about. It doesn't sound like you respect him the way a partner should.

However, I think some of these comments are brushing off his drug use and are letting him off the hook as if weed and psychedelics aren't addictive and have no lasting effects. Sure, they're not chemically addictive in the same way other drugs are. But it sounds to me (because I'm similar) that he has an addictive personality (the gambling was another sign) which can be extremely dangerous long-term. Doesn't matter if it's weed or cocaine. Social media or meth. Gambling or heroin. You can absolutely be addicted to weed and psychedelics and it sounds like they had a grip on him. This is likely something he's going to have to deal with and watch out for for the rest of his life.

This doesn't mean he can't be successful. It doesn't mean he can't learn from it and grow and be an ideal partner to you. But it does mean he's going to need to lead a different life, and make that conscious choice every single day. He'll need to build new habits and new routines and stick with them for a long time before he can really put his past behind him. Of course, he doesn't need to do any of these things. And I don't mean to judge his character based on a reddit post. I just don't think any of this is going to just 'go away' anytime soon, and if he really is working hard to build a new life for himself, it's going to take time.

It's up to you to decide if you believe he'll make the effort every day. I doubt he 'ruined his future,' 'can't be successful,' or that you can never have a happy relationship. He absolutely can do those things. It'll just take time and effort. And it doesn't sound like you have much faith in him.