He didn't report it to outside authorities. THAT is why he deserves criticism.
This is what we know for certain.
He didn't 'enable' pedophelia, as you imply. You should be more careful making such charges.
Did Paterno not have the power to put it to stop if he wanted to, even if it meant harming the program?
Whatever. He knew and he didn't stop Sandusky. Every boy that was raped after Paterno knew (at least as early as 1998) is a boy that wouldn't have been raped if Paterno had stood up like a man.