I couldn’t disagree more. Like you said, he’s perfect casting. Chevy was always a bit if a dick, that was his character in every film he’s ever been in. The problem, as you correctly pointed out, is that it wasn’t an act.

As he got older his shitty behavior got worse and worse. If he could have humbled him self a bit and not been a burden I expect he would have stuck around.

I can’t think of a single actor who could have played the role better.