Why do people hate on these rookies with big pay days?

These guys come into the league and get paid millions. I don't agree with it. But is it their fault? Why bag on the player and not the people paying them? Hopefully this is the last year a rookie can come into the league having proved nothing and get paid more than a 5 year vet.

I just don't understand why commentators and press drill these guys so bad when it isn't there fault. And as for holding out until the contract is negotiated I don't see an issue with that. If I was going to build a house for a guy I would discuss a price before I even invested anything in the project. That being said the NFL is supposedly a business these days so the players are acting like it.