ETH might have made some significant impact at Manchester United such as a top four finish and taking them back to the champions league. He's not afraid of making some big decisions such as relegating Harry Maguire to the bench and tripping him off the captaincy and also the replacement of DDG with Onana. That does not mean that his decisions are always right, I still see the Onana move as a gamble and I am waiting for the season to begin to actually know if he was right for showing the long serving veteran DDG the exit door.
If his solutions work, then he is top. Another question is that Ten Hag led such a specific team as Manchester United with their winning traditions. Any other coach from the bottom ten of the English Premier League league will be carried on his hands and idolized if the team is at least in the top ten. This has nothing to do with the MU. There you are on a horse only with titles. Therefore, this season is critical for Ten Haga. Although it was funny to me personally when the head coach of the team demanded that de Gea and Maguire play a pass in defense near the goal and what a disaster it all led to in the performance of these not the weakest players.