Overwatch is my problem game as well and I agree it’s in a bad state but it holds your attention because of the updates and releases. When I step back I remember more anger and stress than positive feelings with the game. Over the past few years it has fueled my depression. I’ve deleted it many times and whenever I have it has made me feel better mentally and physically. I think the competitive high stress games can be the most addictive especially if you are good at it. It’s normal to feel anxious when something you were using is no longer dependable. I’d suggest perhaps getting a therapist who is helpful with life transitions. Perhaps you would do well in another sport?
I’m not a professional though, these are just some thoughts.