Welcome to the Board. I'm glad you found us and took the time to post.
Judging from your posts, you're pretty angry at the moment, and I both empathize with and understand that anger. When we say something like this --
Chicory, he is complete garbage.
-- that's coming from a pretty dark place. So, if you can...step back, deep breath, and read carefully.
I fought so hard for the person he could be, but I'm done fighting. He doesn't care about that person, so why should I? He drinks to excess, is on suboxone, and now has added weed to the mix.
When people give themselves permission to self destruct, it doesn't matter what we want for them, or how much we care about them. They're impervious to all of that. In your case, your ex is one sick, sick person, and because he's sick, you really shouldn't personalize what he's doing.
Right now, you're raw and in pain, and that's totally understandable. But allow me to gently suggest you should practice letting some of that anger go. Even if it's just for a few minutes a day, you'll feel better in the days and weeks to come.
Keep us posted, and again, Welcome to the Board.