However, Terran are underpowered. like 90% of all the top Starcraft players are Zerg / Protoss, there's very few Terran at the top. especially because Terrans are relatively underpowered at lategame.
Bullshit. Sevral of the most powerful players in the history are terrans.
Terrans are just harder to play, somewhat, but in Korean proleagues that is not an issue -- everyone has micro sophisticated enough to compensate the seemingly glaring imbalance.
(btw, one of the major leagues currently has 60% terrans and 40% divided between the rest)
I doubt it, I'd say it's the Zerg, due to the sheer mass of units that you have. And don't say that: "All you do with Zerg is CNTR + A" because it's not.
Have you ever tried playing TvZ versus a good player? Since mech is not an option, you go marine&medic + tanks + drops + vessels. NOw, marines are very fragile and you have to endure early lurkers and then late forces of ultralisks / fullyupgraded zerglings (true horror) all covered under dark swarm. Plus, you'll have to micro the vessels to use both irradiate and defensive matrix and keep them alive. That's just crazy micro, believe me. Controlling zergs is easier because you dont have to worry about the small things, you mostly control them by packs (like, zerglings surround). and ultralisks need hardly any micro at all. Dark swarm is not a hard spell to use either (just have to keep your defilers hotkeyed and accesibile).
So no, terrans are clearly more micro-intensive. Any progamer will tell you that.
For example, easiest lategame strategy for Zerg against Terran, mass a bunch of Zerglings and Hydralisks, Dark Swarm the Bunkers and rush. It's the key to victory. For Protoss, the reply to this tactic is Psionic Storm, but there isn't jackshit that Terrans can do.
Crappy strategy. Hydras are meat against siege tanks and marines. True horror is zerglings/ultras/lurkers (mutas too, but for harass usually) and of course defilers and other support troops (queen is also handy). Sure hydralisks are used sometimes but it's not that effective because by the time they come up to your siege tank blocakda nd have a chance to come within the shooting range of hydra's squirts, the tanks would have decimated their numbers. Zerglings/ultras here are much more effective here.
Zerg is about macro -- you have to use many unit types and balance their numbers, especially given the huge production rate. Fail at some small number balance, and you might lose a battle because your force is not balanced enough.
