I think they need to sack him,he was given too much time as a coach and didnt do anything and just shows bad rep for the club with all of his decision. After Ronaldo it goes downwards and that is a serious problem for the club. Players dont like him and that can only cause problems,he cannot replace all of the players.
Don't forget his achievements last season he managed to bring Manchester to finish in the 3rd place and that's without Ronaldo. Indeed, this season Manchester United's performance has not improved, I think Ten Hag should be given a chance until this season is over and see how Manchester ends the season. Jadon Sancho does have problems with Ten Hag but that doesn't describe all players and Ten Hag has reasons why he should do it, Ten Hag's current focus is on getting out of pressure and preparing other alternatives to overcome injuries and internal problems.
Manchester united shall give him at least the time till the middle or end of the season. He deserves it even though ten hag's peformance with manchester united is no that good but he shall be given another try. MU may also give us surprise once it was coming to the middle and end of the season.
Everything about this club is about being patiently waiting for a mircale to happen. MU's game play had been decreasing a lot unlike last season. I don't know why but it seems the internal problem that is happening in united has been also triggering its players to playing inconsistently.
Ten hag is not a great coach but he is trying his best to give something for manchester united. The fans can blame him with many of his controversies decisions but it's not a wise thing to sack him.
The management shall give him another chance to smashed it. Ten hag may also still look at the best answer to rebuild the team. Manchester united needs to provide some cashes in building the defenders.