fuck that. how you beat any race as terran is massing as many battlecruisers as you can as fast as possible. use your cannons if they come at you with corruptors, those are the only units you really need to fear when you have that much armor. marines are fucking brood lord fodder. definitely ineffective against any intelligent zerg player. the most you can do with your little g.i. joes is take out any mutalisks that are dumb enough not to run away when you pop your stims. also, early in game before you can build BC’s, like REALLY early, you can send a banshee alone in and usually end the game pretty quickly.