I was going to make a post on this same thing. If you watch the 2019 Ajax side that lost to Tottenham (there are a bunch of full match videos on youtube) you will see the exact same tactics. Which surprised me a little but effectively our defense and midfield this season build up like the Ajax 2019 team and attack a bit more like his later Ajax teams (e.g. Antony staying out wide rather than the front 3 being narrow and swapping positions like the 2019 team). You'll see the exact same gaps in the midfield and similar patterns.
The difference is in the players. The quartet of Onana, Blind, De Ligt and De Jong are so comfortable with the ball that they are able to hold of presses and just play the ball between themselves. De Jong in particular thrives with that space in the midfield, very often being pressed by 2 attackers and beating the press to surge upfield or playing 1-2s with the CBs. In some of the videos you see VdB and Schone pushed high up but at the right moment Schone drops into the gap in midfield to give De Jong an option. however all across their team every player is comfortable being pressed and interlinking. Neres who I think played left wing for them is not as good as Rashford but my god the way he pressed and interlinks with others is great, the whole front three of that 2019 team switch positions and have great interplay.
At United you've only really got Martinez who can play the ball the way Ten Hag wants from the back (if you watch the 2019 team you'd be forgiven for thinking it was Martinez playing as they play very similarly), add in Casemiro as the CDM and you've got a quartet that is just so far below the level needed to play this way. Add in the ineffective press when Rashford is playing and this team as it is is just not capable of playing the style Ten Hag wants. The question is whether the owners believe in the vision and believe they can get the right players in to fulfill it or whether they lose faith in the tactics.One thing is for certain, the style of play cannot carry players, it cannot carry a Rashford that doesnt press, a Varane who cannot pass between lines or a Casemiro who cannot work in tight spaces.