Race a single time against AI in wet conditions and tell the people that it is all ok. You should be ashamed, its been 4 months since game went out and it remains impossible to have a normal dry/eet ...
Ideas
According to the latest patch notes v1.11 the wet weather issue and straight line speed (acceleration out of corners) will be addressed around mid September.
It's probably another 4 weeks or so to wait, but at least it's going to be resolved once and for all.