I had trouble controlling my usage too. When I tried to quit, then started again, I did end up smoking more than I intended too. Once I quit for a few months, then started again, and kept it to 1 day a week for like 2-3 weeks, so I thought I had it. But then it got back to every day, starting in the mornings, before work, etc.
Everyone's different, I may be more prone to dependency than others, so I don't think what happened to me applies to everyone. But for me like you said with alcohol I decided to quit entirely, and not to try to use it again, because I figured it would not turn out how I planned. (i.e. I'd plan to control my usage but turn out more out of control than before)
Everything I used weed for, I don't need it for any more. For example I used weed to try to enhance food, music, or a visual experience like a sunset. But now I can enjoy those things without feeling like anything's missing or it could be enhanced. Or I used weed to try to get new thoughts and feelings, or to have insights or creativity. But now I always have new thoughts and feelings, I have insights, and I have creativity, I don't feel lacking in any of those areas. Or I used weed as a kind of medicine for my anxiety or other issues. But now I actually am not overwhelmed with anxiety, or the other issues, although that took some work, and its something I still work on, I am able to feel okay without weed.
I hope some of that's helpful in some way, just some of my thoughts on it