So tonight sucked - an overload of shitty servers (Valve & third party, looking at all of you - 5 disconnected servers in a row = poor server quality), and one round as infected, we had 0 tanks or witches the whole round and the survivors made it to the safehouse. In addition, our AI was completely retarded and always went ahead, one time triggering a tank while the horde was activated, while their AI was their team's MVP.
Valve has some serious coding & patching to do, because that bullshit basically shows that this game is completely broken.