I feel so shit for wanting to sack all the managers before EtH, when the constants are everything else and not the manager. Knowing everything I know now, I wish we kept van Gaal. He's the only one that was working towards something with a clear identity, even if it was boring, you could see what he wanted to do. But we were so fickle as fans.
Please if you want to criticise someone, criticise the players. They are the ones constantly letting the manager down, over and over and over again.
I'll never forget the first 30 minutes under Rangnick against Palace, we looked the best I'd seen us in years. Then we just never saw it again, it like they all thought "ooh that was a bit tough lads, let's not bother doing that again"