Dear moepmoep:
if you are frustrated of loosing, maybe try to help your team with normal tactics (gain map control, make units to pressure and raid) instead of bertha-rush, commorph, overbuilding energy etc. :)
i know you are actually a very decent player.
Your tactics don´t work because you are rushing stuff while your enemy-team gains map-control wich equals to higher income. higher income means it´s pretty easy to deal with your rushes.