Every person in the car hobby has their own priorities and likes and everyone that brings their car to a show has the right to not be dumped on. To call car shows a "joke" because folks don't have the same likes and priorities as you is an insult to the hobby in general.
The reason you see so many Mustangs, Camaros and short box Chevy's is they were 10 times more popular when they were new and still are.
If you want a show that caters only to what floats your boat go out an organize it and don't refer to the rest of the shows as jokes.