That's one of the unique thing about Chelsea they hardly tolerate inexperienced coaches that is why they always sack coaches whenever they feel he is not doing what they hired him for, so actually Chelsea management is so strict that they always expect there coaches to effect there coaching skills to there players immediately without given them a lot of time to get use to team, so I agree with you that if it was Chelsea that Erik Ten Hag was coaching they would have actually sacked him long time ago because he lack some qualities but however fortunately for him Manchester United is not like Chelsea that doesn't think twice of sacking there coach but instead they always give there coach enough time to get use to the players and at the time develop the perfect strategy that would work for them.