I've posted a few times about the frustration of the achievement structure that requires you to do something that is so obviously "win more" that your opponent concedes before you can satisfy the achivement.

After slogging through 3 of these, I've decided that the fun of succeeding is dwarfed by the hours of frustration watching players concede when you have 15 creatures onboard ready to attack but can't click the attack all button fast enough.

The grind it out achievements are great, the win more achievements are awful. So much so that I've uninstalled. I need a break. I hope when I decide to come back this system is more geared to how people actually play the game.