I think there is no need to change the coach here but if Erik ten Haag applies his strategies in the team then Manchester United can go to a good position. We have seen Manchester United play well in the Premier League before and the same manager may not be able to assemble his team well this season. Since this season Manchester United are playing following their current strategy and cannot progress with this strategy, the coach has to adopt another strategy. A coach always plays the biggest role in winning, that's why I think United's manager needs to change his tactics. Since Manchester United have been in a poor position this season, if they are to improve, the team will need to work harder and play differently.
Neither a player nor a coach should ever be held responsible for a foul in a match. Manchester United have been in the doldrums for a few seasons now so I think they should revamp their game plan. By playing the same tactics over and over again, opposition teams can easily plan against both Manchester United's abilities and inabilities. This may account for their poor performance. Manchester United's coach should manage the match with different tactics so that there are errors in the opposition's plans.
We cannot blame any particular person for this deluge. Long term success requires doing well as a team. In this case, they all have to work hard and be patient. We all know Manchester United have already shown their ability but currently they are not in a good position, we can expect them to make a comeback very soon.
Those who gamble on Manchester United matches should be careful, because Manchester United team predictions are very difficult right now. They can return to their prime at any time, even as they continue their consistent performance.