I'd say that some of that is true - that he's got them finally playing, for instance. But the facts are that he's marked as being an "almost" man. For the positions he's held, and the ability of the teams he's had, he's fallen short. Examples such as when we came third in a two horse race, etc mark him down as being unable to get that final ingredient to make a good team a great one.Lol, way off the mark here - He's come out of this fairly intact and most people seem to be scratching their heads as to why Chelsea would be moving on given he has turned it around and got them clicking in the second half of the season, if the season went on another couple of weeks they'd have likely finished above us and cgallenging fir the CL places. He will be in a good job come the start of the season.
Chelsea fans saying he wanted to keep Gallagher & Chalobah and have more say in how the team is built whereas the club want a manager who will take what's given - i mean more fool him as that was clearly the way they were planning to operate when he joined.
Before the Chelsea thing I'd gladly have accepted a second round of Poch, in the hope that by the time he came back he'd have gone away and sussed out where his approach fell short and remedied it. So far its quite clear he's not achieved that, and the failure at PSG was a stark one - that's a one club league and he barely made that stick, losing the league to Lille in the first season.
So yes there will be a number of people out there who are eyeballing Chelsea and wondering what they are doing, but the majority of people I would say will be looking at Poch and thinking that if their aims are winning trophies, he's really not the guy for them.