Yes, many of them are hideous. And they’re based on real parts sold by real companies to put on real cars. There’s no accounting for taste. Some people like those things.
The carbon fiber pieces, often called ‘dive planes’ or ‘canards’, are functional pieces to produce downforce, and thus are completely appropriate to be there on the race-oriented FM aero parts.
The rally parts are actually pretty awesome if you understand the history that they represent.
So people like them and some don’t. Sure they could have better kits but seeing as I could just not use them and the fact that there are REAL problems with I don’t really care
Keep in mind, add-on parts and even rims, are those which are approved under licensing my the individual manufacturers and not up to the choices of the developers. The various makes/models of the cars are to be depicted as legally approved by the manufacturers as contracted. There are real-life reasons why we can’t just slap any rims on any car, and that goes for the body kits, too.