The reason I believe that Manchester United coach job is at risk is because when you talk about dismissing a coach it is always done at the beginning of the season if the club feel that the coach cannot lead them to their target end. Any club that refuses to dismiss their coach in the early time of the season will definitely get wrong result even if they later do so. This is because the New coach would complain that there is actually no time to turn around the poor performance and would likely request for a new season. This might plunge the club to a situation of dismissal and hiring of coaches just like Chelsea.
It is therefore important for Erik 10 to prove that he is capable of remaining in Manchester United as their head coach. There is some kind of revamp of the management of Manchester United, so he should understand the body language that it is no longer business as usual.
Changing coaches at the start of the season after a few matches have been played sometimes happens often. but the results are sometimes always not good enough for most teams. But if the current coach is really monotonous and continues to make the team get bad results then I think keeping him will also make the season a waste. So it would be better to take the risk by looking for a replacement that is considered to be better. But Erik Ten Hag must also be given enough time this season to show his hard work in building this squad. And who knows, this club will bounce back like what happened in the first season when Ten Hag came to this club.