Firstly, I LOVE this sim. Filled a hole for me on my Steamdeck and it runs superbly well. Controller support, on the whole, is great - touchscreen needs used a few times but hasn't bothered me. However.... driving on the rain is nigh impossible. I tried out the first game in Championship and it had old GP cars and free practice was rain. Put simply, I found it too hard. I used automatic gears due to being on gamepad and of course just the slightest touch while in first gear spun me out. Ended up skipping free race and qualifying. Thankfully the race was dry and I finished in third place (AI difficulty 90). I'm sure there will be times where the race itself is wet, meaning I will not be able to finish it. Is there a setting I am missing to make cars drivable in the rain?
If it's any consolation, almost all open-wheelers in AMS2 are difficult to drive in the rain, even when using a high-quality wheel and pedals, and even with all assists under gameplay options enabled.
Of course, it is more difficult to drive a car in the rain and when it is wet. But that wasn't his question, it was this: Is there a setting I missed that makes cars drivable in the rain?
…and both you and I gave some suggestions for settings: You suggested throttle sensitivity and brake sensitivity, while I suggested assists under gameplay options. I think both of these suggestions are good places to start, approaching from different angles. There's also an option where you can reduce the AI wet skill, but in this case the problem is loss of control of the car, not necessarily qualifying pace in comparison to the AI.
