Great, another n00b coming in to bitch about the balance, in their first post.
Trem is balanced, each discussion like this ends in it. Alien team requires more skill, good players go to alien. N00bs go to human, because it is the tried and true fps.
Humans camp
Aliens wait till s3
Mow down crappy human defenses.
Aliens win.
Simply this.
Get good at the game, dont camp, and attack more, aliens will loose a fair number of times.