Max Level - Feels like a chore and is not even slightly fun.
Co-op treasures - Unaddressed issues, ND can go and .... Insert profanity here themselves for that.
Lag - Makes competitive feel horrible, when I do well I feel like I'm probably cheating death and when I'm doing badly I know everyone else is cheating death.
I still play an awful lot of this game and I intend to until I get some more games for my consoles.
If I were ever to leave, it would be due to boredom, lag, lack of tech fixes or objective fixes, new interest in other games and prioritization of school, life and other hobbies.