Woah!
Angry crowd in here

I am sure SL realizes there are lag issues at the moment (which btw. of course also affects your ability to BR).
Haven't done much offline racing, but from the few laps I did do, it seemed like handling was normal there. So I am assuming most issues you are experiencing is due to lag and strained servers. I am guessing they will need some load data from the coming days to address this, since patch releases always generates abnormal traffic (they cannot size their services according to that).
Anyway, I agree with the online issues described by others in here, and I think, it is great people are providing their observations, but why are you assuming they are not working to fix it?