It's okay if you voice your opinion, but just saying it sucks without giving any constructive criticism is pretty useless.
since you removed some of them ill give my "constructive criticism" on the remaining 3.
Soldier and pyro: complete mish-mash of garbage with no theme. maybe you were going for a funny randomness scene but it didn't work. random=/=funny
Engineer: blank face expression, default pose, and everything is dark besides him
Spy: this one is the worst. Red skin on the hat, dev texture background, blank expression except for the widened eyes, and the cylinder on the revolver is missing.
you shouldn't have to have me tell you what's wrong you should be able to tell that these are complete garbage