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.
Yes of course, during the Abramovich period, Chelsea was known to be very strict with its manager. The decision to fire a manager is often made quickly if expected results are not achieved. This was done as an effort to ensure the club remains competitive at the highest level and wins trophies consistently. This philosophy has brought much success, including several Premier League titles, the Champions League and other domestic trophies.
However, it should be noted that each club has different policies and managerial philosophies. Some clubs prefer to give managers time to build a team and achieve long-term results, as seen at Manchester United with Erik Ten Hag. This approach can provide stability and sustainable development although it requires patience and time.