[quote=Boboclown89]
I'm not sure why that even happens, considering how many heroes there are, it doesn't matter if you have 1000 hours, you find a new hero you never played a play it, you mess up something when playing them
[/quote]

It's only the casual players who do that. The pros don't act like total dicks (asides from a few). Also, it is possible to be decent in all the heroes in D2, I've been playing dota for 8 years now, so I know the ins and outs of all the heroes, but I've only mastered a handful :P