If you think tactics or subs or whatever else football related has been the biggest problem this season, and you can operate a piece of technology well enough to post on this message board, you are a true enigma.
His future here will depend on his ability to get some of these players to focus and work like professional football players at the highest level, and play with a level of discipline required to compete for the Premier League. They wouldn't do it for Mourinho cause he wasn't very nice to them, they wouldn't do it for Ole because he was too nice to them, and so far Ten Hag has not been able to get it out of them on a consistent basis. Enough years have gone by that it has now become an acceptable standard at the club. The players that are responsible for this cannot stay here, but I fear one way or another this poisonous rot will cost ETH his job before it can be weeded out.