Qwiss True, but Ten Hag was a catastrophy in his own right who put them were they are now. He never showed any signs of being able to build a functioning squad. Imagine signing Anthony for £80 million - they should have shot him on the spot. That is the pound for pound worst signing in the history of football, and Ten Hag probably made another 2 or 3 in that top 10.
The missed opportunity for them seems to have been Ragnick in retrospect. He came in and told them quite bluntly that all their players were crap and they needed open-heart surgery, but they didn't want to listen.