AI gaining Massive Speed on the straights

Experiencing this as well. Playing Bahrain at 95AI. No assists and driving as Sergio Perez in GP mode. With DRS and ERS engaged I can barely get by another car on the front straight. Something just seems out of whack. I thought Red Bull had a straight line speed advantage and yet I can't get passed a Mercedes no matter how perfect I exit the last corner. I have to out brake them into turn one and the AI turns into me all the time unless I have a wheel ahead of them. It's like they have zero awareness that you are along side. 

I tried the top speed preset and still struggled to get by with DRS and ERS. 

Mainly I've been using TRL's setup but lowered the on throttle diff to avoid spinning on corner exits. I even lowered the front and rear wings by 4 each and did not gain any top speed advantage. 

My other gripe is new tires feel like I'm driving in the wet. 20-30% throttle will spin me out. I can barely get through turn 1 and 2 at Bahrain coming out of the pits and I lose the race every time on my out lap.