I hear you. Not only does the AI have all buffs at all times, they are deadly accurate, incredibly efficient, and extremely methodical at completing their objectives. Meanwhile, YOUR team's AI is HORRIBLE!!!
Your team is a bunch of rookie chickens, running around with their heads cut off. They NEVER complete any objective and you have to babysit them through the entire game. They will rush into battle blindly ignoring the opposing team and get gunned down. There were numerous times where my entire team was dead in one hallway and it was me against the entire Resistance. Not to mention they barely ever refill your ammo of buff your skills.
They need to make your teams AI better. I don't mind the computer being tough, but when you can't even rely on your team to do ANYTHING, it's frustrating. I still enjoy the game but it can really eat at your nerves when you get steamrolled nonstop.