In my case, I lost motivation. I could set any objective I want and still can't reach them. It is also a question of patience, a thing I lost a while ago. With new balance after each patch also doesn't help.
When you try hard and fail over and over, motivation vanishes slowly as well. Also the calls of skill issues and the likes can also influence someone's will to learn. Also, I am hopeless case.
''If you’ve tried to improve but stopped somewhere along the way, why?''
I hit a wall and can't go through even after efforts and it makes me saying: ''Oh well, just too bad. I stick to where I am.''