@Lowmassion I agree, the AI is out of control. What I've also noticed is that, if you have an AI ahead and behind you, the one ahead will literally slow to zero mph going into a corner so you have slam on the brakes, otherwise you hit him, while the one behind will smash you out of the way.
Also, they will sometimes brake test you while in the middle of a corner. It's absolutely insane. Every year they get more aggressive and it's really spoiling things. I got smashed so hard by an AI at Brazil that it span me into the pit lane and, as I have auto pit on, it actually took me into a pit stop. WTF.