Enderman isn't really that op if you think about it. It's easy to hit, and it dosen't deal that much damage. Yes it's a bit annoying that they skip parkour, but if not humans will win ever single round every time! Endermen simply make it possible to deal with people parkouring, as certain spots take at least 1 min to reach, if not more. And as the infected are easy to kill they will have to come at you at least two or three times before they can kill you. And even if 5 infected target you, it won't really make you face that many infected trough the game, at all. In a certain spot on the city, I usually remain alive until at LEAST two endermen target me at the same time, as it dosen't take much time for them to get there, I face them with only small breaks with the longest being 15 sec (if I kill them all at the same time), even with these conditions I survive for a while, just imagine how easy it would be if they had to walk there every time (takes about 45 sec - 1 min), I would barely face anyone, and if I wanted to I could get even further away, I would be pretty much garanteed a win EVERY round.