Chelsea should be able to put trust in every coach they employ, like Ten Hag at Manchester United and Arsenal with Artata. Not all coaches are able to do a great job in just one first season, even if it is not impossible, it will be really difficult because of the adaptation process.
Chelsea is completely different from other elite EPL club. They're strict when it comes to their managers and not welcoming any relenting outcomes. Erik Ten Hag in Chelsea? He would have been sacked long time ago. The previous owner, Abramovic doesn't welcome any relenting efforts or if he sensed any form of incompetence from the headcoach, he will definitely make good use of the sack letter.
Messy Chelsea. Big club, big money, big egos, no stability. They want everything now. Now, Ten Hag. His Manchester United performance was decent. But he had time. The season was his chance to create his team. Chelsea? A spinning door. They fire managers faster than I fire Apprentice contestants. Both Pochettino and Maresca are good. The best coach cant win with a chaotic team. Plan, vision, and patience are essential. They should let the coach coach. They'll keep failing unless they figure that out.