I'm pretty new to all this, but I didn't find out that my easy child was difficult child and smoking pot until he was nearly 17. He had no money, no job, no car, but his friends supplied him with whatever he needed. Such pals...
After reading the stories here, though, I can honestly say that if I had found out about his problems when he was 15 instead of almost 17, I would have been much more aggressive in seeking help.
I don't know about where you live, but in my town we have a very "robust" juvenile crime/support system. I just caught on too late to make use of it. Now, I'm hoping to make some kind of positive difference on him in the few months left before he goes to big boy jail if he screws up.
My advice is to get active, and do it now. The longer you wait, the older they get, the less you can do. Check with your local DSS and Juvenile Court system (anonymously, if you want), to see what help is available. When I checked with my local town, they said they'd rather put money into correcting problems when the kids are young than have to put them in jail when they're older. Kinda cold, dollar-and-cents approach for them, but I guess it makes sense.
Start now. Do not pass go, do not collect 200$
Also, I agree that he probably doesn't really "hate" you. I've found with both of my difficult children that they are masters of verbal manipulation. They've learned what to say (or not say) to get what they want. In my house, if my kids said they hated me then it would only spur MY anger response, and they wouldn't get what they were after. So they don't say that. They do, however, have their own other ways to get at me.....
I have another post out there somewhere where I talk about my recent visit to the my therapist (who is also difficult child 1's therapist). The session was really bad, but he said "don't take anything he said personal; it was all about him and what he wanted, and he was saying whatever he felt would get to you".
Don't want to play psychiatrist from afar for you (don't have a license), but I'd guess it's much the same for your difficult child as well. If you haven't done it already, you may want to get some help for yourself. Kids, like dogs, can smell fear, anger, and other emotions, and use that against you. I finally had to get medications to control my anxiety attacks, which took away one of the weapons my difficult child used against me. Just my two pennies, but it may be worth looking in to.
Best wishes for you and your family.
Mikey