Chelsea is not like Manchester United, the owners don't give second chance and they're not relenting when the appointed coach in charge looks incompetent. Todd Boehly sack Mauricio Pochettino and was bad news for the Blues because Mauricio Pochettino have sealed the europa spot but couldn't convert his chances. Manchester United hooked up with Erik Ten Hag because he was the man for the job. He deliver quite exceptional tasks for the growth of the Red Devils. Erik Ten Hag would have been successful in Chelsea.
Each management has a different view on changing the club for the better and sometimes it seems like they are forcing business within the club even though football is now inseparable from business for those who own the club.
Chelsea were slightly better than Manchester United when it came to standings at the end of the competition and Mauricio Pochettino's dismissal was carried out because management considered him a failure and not the coach which needed.
Erik Ten Hak received much better support compared to Mauricio Pochettino, even though he failed to bring Manchester United to compete and finish in the Champions League zone. But I don't understand what you mean, that Erik Ten Hak will be successful at Chelsea?