One anti-pattern at most MAANGs is too many senior people refuse to listen to ideas of others because their egos are too large. (Not unexpected when someone lives in a tiny corner of the company and is paid $500k-$1.5M TC.) They believe only their ideas are "better" and everyone else should only listen to them. There are 2 ways to approach this: either lead them to an idea and let them take credit, or work somewhere else because particularly stubborn "old dogs" don't want to learn "new tricks."