That's not true. Everyone gets older, no one expects him to go crazy. The general Brad "hate" is about him being a lazy fuck on stage. He's turning around all the time and kinda hides at his side of the stage, or his lazy and sloppy guitar solos. And for being so bad at the M&G's.
He has his moments on stage of course, he enjoys Numb a lot, Burn It Down and a couple of others I can't recall right now.