I disagree. There have been several years when weed was highly instrumental in me being able to maintain stability enough to hold down a job, held it down for 7 years straight thanks to that plant, without psychiatric medication. The trick for me was to not smoke too much, basically to not abuse it, just a bowl before bed to alleviate depression/anxiety and help me sleep (which helped a lot to prevent dysphoric mania, which I tend to get from sleep-deprivation).

However, I do understand that weed cannot be for everyone, that it will have terrible effects for some people. And I find it very admirable when someone is able and willing to acknowledge that for themself and take a stand to quit. So kudos to you for having that level of self-responsibility.