I'm agreeing with everyone else. Even Rank 100 bronze players realize Colossi isn't a hard unit to micro.
I can literally get up from my chair go make a sandwich and come back to see groups of zerglings/marines roasted from the colossi's auto attack.
My mouse stopped working and I watched as my colossi just destroyed everything without any micro.
Also I agree random is pretty annoying. PvP and ZvZ makes me want to punt a baby across a room. TvT I enjoy though