I hope the Manchester United job doesn't end up messing things up for Ten Hag because some fans are still doubting his ability to make things get better at Bayer Leverkusen when he couldn't bring any positive changes in the Manchester United team. Ten Hag was supposed to meet a good squad left by Xabi Alonso but seeing how the team has sold out some players in the team means he will never to recruit and build his own players.
I don't think it will mess anything up because we should know that when it comes to coaching, there is a time that your coaching will no longer be useful to them, and they also listen to their fans because they are nothing without their fans, so there is a serious need for them to be very serious. Coaches need the club to be consistent because every club wants the success of their club, so there is always opportunity for them somewhere else, and that is why I don't see anything wrong with Ten Hag failing is because things will not always go as you want always.
And from the experience he has gotten i thing he will do everything in his power to actually help Leverkusen become a better club, even if they are already looking like a made club already so there is little work for him to do but i trust them, because the kind of way they are playing there football is just something else i so much trust them that they will do well with ten hag, he should make sure he does not dissapoint.