Is it proven that Ingram doesn't work?? No, it isn't. This team, as constructed is what hasn't worked. If you don't pay Ingram, you're going to pay someone else in the same tier as him. How many of these types move the needle? And are they available for NO? What other players do you replace him with that want to play in NO, that will move the needle, and keep Zion content?
If I'm the owner it's simple.. Keep Ingram and Zion, get rid of CJ. That is the only way this team will even sniff at a championship. Otherwise, no one is coming. Lastly, this is a team sport. You wouldn't say AD didn't work, because he clearly worked in LA. It's all about the roster, and coaching staff.