This seems like the case for me lately. I like to be the best that I can be at anything I do and I also have an extremely addictive personality. I had some junk that I was addicted to when I was younger and when I cut most of that out pool has been my outlet and new addiction.
For the first few years I had fun shooting every time I shot no matter how I did. Now I'm to a point where all I care about is getting better. I find myself getting frustrated faster, I find myself getting pissy with the rest of my team when I'm struggling through no fault of their own, I feel like at this point pool is work. Even when I win it seems all I can think about is what I did wrong during my game and don't feel like I deserved to win they just happened to play worse. Last year I had 4 ero's and the most 10-0 of our league night. This year I have no ero's, no sweeps and I don't think I have a 10-0. I practice more than ever before yet the outcome is just getting worse and it's coming into tournament time. Maybe it's time to just put the cue down awhile and see if when I hit the table again the enjoyment comes back.
Has anyone else ran into this and how did you change your mindset?
It sounds like your frustration is resulting from plateauing. Usually to break plateaus you need to learn different (different games, different books, improved mindset, lessons/different insight, etc.). Getting past plateaus is all about doing what it takes to unlock the necessary doors, and the willingness to put in the work.
You might ask yourself this question: If I improved at a more rapid rate, would the game still feel like work, or would I love it again?
Good luck