It's not clear whether you think the problem is them or is you.

They own their problems, and the best you can do is tell them what you think, and maybe encourage them if you see some positive sign. You can also act as a positive role model, but people in that mindset are unable to draw lessons from others.

But if you hang around people who you think are miserable and self-defeating, and you don't want to move on, but you don't like it, maybe the problem is you.