If you judge a fish by its ability to climb a tree, it will live its whole life believing that it's stupid. And in the case of Manchester United, this is exactly what is happening right now with some fans' perception of Ralf Rangnick.
When he replaced Ole Gunnar Solskjaer, there was real hope that Rangnick would be able to steady the ship before leading United to a top-four finish. Given how his spell in charge has turned out, it's clear to see that we were being a little optimistic.
Much was made of Rangnick's 'godfather of gegenpressing' reputation when he first arrived, but it quickly became apparent that the German would be unable to get this United team playing the way he would like. In fact, the first half of his maiden game in the Old Trafford dugout against Crystal Palace is the only real occasion where we've seen his philosophy implemented.