When Erik ten Hag was first brought in, he was a manager who was expected to bring positive changes to the team, especially last season when MU finished third in the EPL, everyone believed ETH would bring good changes to MU.
But for some reason this season, after bringing in many desired new players, MU was unable to meet the expectations of many parties.
and I agree with you, if the bad results continue, of course the pressure will be even greater. So Erik ten Hag must be ready to take responsibility for MU's current condition, so that the choice to withdraw for ETH is the right choice.
As the manager, he should expect a lot of trolls and criticism for his team's poor performance, and this is true for any manager in football. Eric Ten Hag did exceptionally well last season to qualify his team for the Champions League this season, and that is what fans and team management continue to demand from him, even after they added new players to the squad to make them competitive.
All of this should only motivate him to work harder to improve the team's performance in this competition. If the team is eliminated from the group round of the competition, it will be a major setback because they have a solid chance of qualifying for the knockout phase. It is now up to their efforts and resolve on the pitch to determine if they will advance to the next stage, which they should be working on by now.