Jeez. We've been dealing with this nonsense for months. Are they blind?
1) Skeleton Army: Oi. Easy to kill, yes, but if you don't use Zap (we'll talk about that later), SA will kill anything before you get the chance to wipe them out. Having to target so many troops is brutal. They don't take that into account. Reduce to 8,max.
2) Balloon: Oi. One developer once said if you get your balloon to the tower, you should be rewarded. Rewarded with an instant tower destruction in 3 seconds? Get real. If you don't have 15 anti-air cards to drop-down at a moments notice, you're done. Wake up.
3) Zap: You have to use it. The game is designed around it. You're going to have trouble if you don't use it. Whether it's direct damage or resetting every card in the game, jeez, why must the game revolve around one card?
4) Goblin Barrel: This is the biggest crime ever created in a game. Toss it up all day long and win. Great job user. Great job card creator. It's disgusting. Miner has reduced direct tower damage, so must the Gobs in a barrel.
They like this stuff. Frustrating players sometimes causes them to spend money. It just causes me to puke.
Device: Galaxy S7 Edge