Ten Hag is certainly responsible for his team's poor performance so far, but all players must also be responsible for their poor performance on the pitch. The fault is not only on the coach, but the entire team is to blame for the performance.
I remember there were several players who deliberately did not play at their best because they didn't like the coach. They played so badly that the coach was sacked for poor performance, it worked and I really wonder if that scenario was thought of by a handful of Manchester United players? If that exists, then I'm sure that in the end Ten Hag will be fired even though he managed to lead Manchester United to qualify for the current Champions League.
Of course all players have to evaluate their respective performance and also for Erik Ten Hag he has to find the best way to restore his players' performance to appear more impressive in every match. The decline in Manchester United performance this season is because new and old players have not found their best form in their game. I think Erik Ten Hag must find a game scheme that is easier for the players to understand in order to perform better and win.
Apart from that, Manchester United star players like Rashford also seem to itp very difficult to show their best quality this season. He was only able to score 1 goal in the 8 matches he played. Of course he experienced quite a big setback in his game because last season he was so productive in scoring goals.