What a bizarre statement in an age when the phrase "executive meddling" can describe the sameness of so much content output, and most of the greatest flops have a story which goes "yeah there were too many people involved".
Like the second Avengers movie had this problem in spades.
It's not a bizarre statement at all. An executive meddling with something because X or Y element of a piece of art doesn't align with A or B market trend is not the same thing as people working together and sometimes clashing due to creative differences. You'll find that most works that you, or other people, like weren't the result of a sole individual's creative decisions going completely unchallenged. Others suggested, or revised, or fought. There can be too many cooks in the kitchen, of course, but that's an entirely different issue from executive meddling.
I'm not sure why you jump to executive involvement when I specifically stated two creatives butting heads. There's all sorts of stories where execs or someone came in and forced a movie to have, eg a giant robot spider in a wild west settint that didn't make sense but they really wanted one in some movie so they forced it to happen in one of the projects they were overseeing. but the sum of us is better than individual, so while there are solo artists out there, they're the exception rather than the rule.
Like the second Avengers movie had this problem in spades.