I probably don't understand everything you wrote. However, I think I don't agree with you. If I just did what I enjoyed, I would quickly fall into bad habits, which would later lead to even greater depression.
TBH I do think it's impossible to change one's mindset. Because no one can grind on what he doesn't like for long. Some people are just born to do great things while most of us "just enjoy video games" and try to grind again and again without success.