I can understand Venice being trash tier (because their civ might as well be called "single city challenge"), but I've seen a lot of other tier lists in which they listed Iroquois as being one of the worst civs next to Carthage. Are they really that bad? I tried Iroquois myself (because I love playing native americans) and I found that not having movement penalties when moving through forests and jungles is a pretty good bonus early game. It allows you to move your armies better. But I don't know, since I only started playing Civ V.