I find these cars very tricky to drive compared with similar cars, such as the tatuus. I may just need more practice, or need to set them up. The double rear wing settings are a bit confusing, and there is no guide. I like the look, and the sound, and everything else seems well done.
If you are still facing issues, just make sure to run stream file integrity for AC. Check this post for more details: https://www.racedepartment.com/threads/rsr-formula-3.113918/post-3215194