The AI is all over the place. Super slow in the wet and regular slow in the dry, until they are fast some random times?
I struggle when they have a huge head start and there isn't much room for overtaking, like on nordschleife. However, if there is more rain or just rain at the right times, I'm good. For example, the Schwartz german cup. The two others were easy, I used a Taycan. Tuned it up a little for the nordschleife race and added intermediate wet tyres and aero. Got 4th place because the race was mainly dry. In a normal car you catch up on the final straight and then need to keep it stable when slowing down. Not so much with the Taycan only managing 260kmh.
Second attempt... raining the whole race until the last few mins. Lots of water on the track within a few mins of the start. This time the leader cars are all bunched together, as always happens with properly wet races. So I could get in the lead by 4/5ths through the race, created a lead of 7 sec, lost 1.5 sec of that on the main straight, then gained some back to win by 6.5 sec.
I understand they're all driving RWD in this instance and I'm AWD, but it's not that different when I'm RWD either. I win easily when it's raining heavy because they're so slow that I can overtake even on tight tracks. In the dry, the 8th-4th place can hold me up a lot, and the gap between 2nd and 1st can be huge, so by the time I finally gen into 2nd I've got 1 lap to close 10-15 seconds. Stupid.
In the mini 350pp restricted race at goodwood I got the old hot head 3rd place that when you overtake them their car gets a pickup on the road like mariocart that gives them nos. Suddenly they overtake the 1st place car just after you and and and ramming you as you brake into a corner. Then they drive up the back of me swerving like they have 20% more power than me, which isn't really possible with the restrictions in place and the fact I easily passed them 1 min earlier.
I get the same in a lot of other races... Blue AMG C63's are commonly the angry car that behaves like the mini above when you overtake them. I've had a few that were slow enough to overtake but then charge up to clip your rear end and spin you out on the next corner.
Clearly the AI needs some work... then we can have proper grid starts where you start in the middle and work to overtake 3-6 people over the 5 laps, not 15 cars starting vastly spread out that you need to overtake. I'm still having a lot of fun but the game mode takes away a lot of the reward and instead replaces it with fake video game reward where you expect to be the superhuman protagonist and everyone else is just a background character in your way.