I played wakfu since beta, let me tell you why I stopped playing:
General technical crappyness.
I can stand stupid devs decisions, I can stand "improvements" nobody ever asked for, I can suffer through annoying boss fights (as annoying as they are supposed to be "exciting" and "tactical"), I can stand lack of balance, I can stand devs lies and massive derps (and lies to cover massive derps). Basically, I can (grumbling, but still...) take all the shit ankama is throwing at players.
BUT I can't stand when java game gets severe framerate drops, when I have to wait few seconds to open stupid inventory or map, when I'm losing AP's because f..king animations don't let me finish the turn ("f...king animations" is the only way I can refer to this annoying, non-turnoffable crap, and I refuse to refrain), when game logs off for no reason, when bugs are so old that I can't remember when I've noticed them first time, when I have to relog after each dun (after half dun actually, but I used to force myself to finish the dun with borderline slideshow). Pleae don't tell me to get better comp. First, it is a damn 2D game. Getting geared up for this is ridiculous. Second, more important - it wasn't always like this. I didn't have half of these problem 6-7 updates ago. Game code is getting worse and worse.
At some point, stuggle with technical side of the game overweighted the bits of joy I was still able to gain from the game.