I like Agile, I really do but a few times it has me walk out on the process as a few think that everyone must "buy in." That's just part of the problems I've run into and kind of glad I'm no longer on such teams. In fact if a company does go "all in" on Agile I may want to short their stock. I think it works until they try to forget what the real goals are.
The real goal is to get the product out the door. Some folk love to get wrapped up in the process. The process to them is all that matters. Someone made a funny albeit dark meme about it.
The full meme is over at https://imgur.com/gallery/23mdpAa and fair warning the end is very dark.