Tie between Warface and Fappy Wars. The former for obvious reasons... As for Fappy Wars, tbh I actually like the game. It's just all the microtransactions and pay2win bullshit that drives me up the -blam!-ing wall and ruins the game for me.
Now more than ever too, since they added all these ridiculously op super premium items some of which can be evolved. I can't stand running in to some berserker with [i]two[/i] evolved weapons along with super premium gear and then go to check their other classes only to see the same shit with their cleric/engineer and mage/zephyr...