A lot of the styles and forms are pretty much useless in an actual fight. They look good when being practiced between two equally trained fighters, but wont really hold up in an actual fight.
One clear example of the how some of the styles are flawed, just sit back and remember any old fight you have with other kids on the street or in school and so on Or any other fights you saw on the streets. Try to count how many of them were actually conducted in fully standing positions... making tactical kicks and trading punches. In my experience this number should come out to be pretty much 0. Most of the fights end up on the floor pretty quickly. This is one reason my most MMA fighters spend a lot of time paracticing wrestling, ju jitsu and other similar floor fighting styles as compared to say.. .various animal styles of kung fu.
If this is what you think, then you might want to consider the following points:
1. Forms are meant for learning a style, not for learning how to fight. Learning by rote is a staple of Chinese education. In
wen (literary skills), students learned by reading and memorizing entire books. Likewise, in
wu (martial skills), students learned by practicing forms.
However, just like someone who only memorizes books without any practice on actually applying the knowledge in those books will fare poorly in a real job, a martial arts student who only practices forms without sparring and even real combat experience will fare poorly in a real fight.
Again, like I said, there wouldn't be so many styles if they weren't effective in a fight.
2. If you think that MMA ground fights are examples of "real fights", think again. Going to ground, in any fight outside of a 1-on-1, is a really bad idea, as you'll be defenseless against your opponent's buddies. This is why in Sanda, they practice throws without following your opponent to the ground. In a real fight, if your opponent is down, and you're standing, you can quickly end the fight with a kick to the head.