I can't reply to everyone, sorry.
I'm not saying our previous managers were good enough, far from it. They accumulated this squad of blood-sucking parasites over several years of God-awful recruitment. So why are you looking to make Rangnick accountable for his predecessor's mistakes? He was never meant to manage this side. He only did so because Ten Hag was unavailable at the time, and the board wasn't interested in Conte.
This side underperformed all season long for Ole, and now they're performing the exact same way for Rangnick. They gave him 30 minutes against Palace before giving up. Ask yourself, what were you expecting from Rangnick?