Can't upvote this enough, and I live in NL where worker protections make it hard/impossible for them to fire me for stuff like this. I'm a very honest person, so I've never had issues speaking my mind to anyone because I also don't really believe in the whole hierarchy thing.

I have approached management with stats, hard facts and level headed, calm discussions many times. It doesn't make a difference. Execs do not give a shit, unless you're also an exec, and they will pretty much always ignore anything you have to say. If you don't align with whatever idea they have at that moment, you're "not being a team player"