He literally took Chelsea to 2nd in the prem, and finalist of UCL, only lose by penalties. I don’t really know how he got the job in the first place as he really hasn’t got a world-class CV before that, but this specific Chelsea season of him just isn’t bad in any way. I know their team is full of world-class footballer but it still takes a good manager to take them that far.
So, what happened?
He may have been a decent person, but he wasn’t a quality manager. He inherited a team that Mourinho had built into a hugely successful team that had leaders all over the pitch. Mourinho may have been there a few months too long but the core of both the on field and off field team he left was incredibly strong. You can’t compare Grant’s time in charge of Chelsea with Fergie, Pep or Klopp’s first seasons in charge as they were either having to build a club virtually from the bottom up or were implementing a completely different style of play