When you're powerful in a context, you'll think you're more popular than you are.

"Everyone who shares an opinion about me tells me they like working with me!"

You won't notice the people who aren't sharing an opinion, because it's hard to notice an absence.

Someone telling a powerful person they don't like them is all downside.

Why do it?

Just quietly put up with it and look for an opportunity to exit, or push the lead off the stage.