Well microed AT guns are no where near as effective in COH2 as they are in CoH1. You must support them much more and keep them more back. No hold fire on ATG's however is part of the issue.
Yeah, no hold fire really sucks. I'd also like to see armor take priority in targeting. Right now its ridiculously easy to decrew AT guns with both sides. Strafe can decrew an entire Zis within seconds, as can a flameHT/Ostwind or T70/Snipers with Soviets.