Not everyone are meant to be pro, SC2 is supposed to be fun to be played at all level...

I'm actually same as you not pro player and not good in starcraft so I also not sure how imba is Zerg but i think its rather balanced, only pro player will know. But although I suck at it I still like the game.

just remember to have fun, don't need to compare with pros. I blame those pros acting cocky chasing away noob players away.