red8D님의 댓글

Chapter 4 targeting is so much smoother than Chapter 3's, even though the lag is far worse. Some of those maps were ridiculously tough(I was only level 52, no 6 stars), that actually started feeling incredibly rewarding having to grind out strategies for each map and execute well.

Ignoring the f2p/p2w stuff, the game itself starts getting super frustrating because using the manual targeting is super important, but the hitboxes have this weird(read: retarded) interaction with the tower firing animations that make it borderline impossible to click monsters at times. It's infuriating having a great setup but being unable to execute because you can't click the 300k hp siege beast, and your towers FFA and shoot random things instead of funneling all your aoe/hitstun where you want it.

Don't fear the final boss, he bugs out and you have to quit your game, which is pretty cool if you never saved.