He did come up with a brilliant tactical plan in the final.
He also doesn't want to change from his best transition team plan he came up with under Murtough which has lead to so many thrashings, and getting beat by newcomer managers.
He supposedly looked back at past United teams and wants to bring fast attacking football for the fans, edge of the seat stuff. His first Ajax team was also similar but I think it's very dependent on players that can be clinical and cover the spaces left. There's an element of truth that the fans wouldn't enjoy possession football but also his looking back misinterprets what our past sides did and his own attacking style seems quite flawed outside of an ideal 11 at their peak.
It's clear we can't carry on with his transition plan, he either adapts or we have to sack him. We can find a middle ground to be more disciplined, Bruno was excellent in the final, he can play that way and be creative, it will even help our players like Rashford and Hojlund that want to run at defences that have been brought forward instead of facing already set lines.