AI is only there to build up your score, they are all but harmless. Like "creeps" in a MOBA game.
But it's good they're there for people who are new or not very good, as they can still make a pretty big difference in whether your team wins or loses.
Actually Ben Kuchera has a pretty good writeup on the game
Titanfall is the perfect game for people who are terrible at first-person shooters | Polygon