We've just made a whole summer of expensive flops who nobody else wanted. De Ligt was good as a teenager but never developed since Phil Jones MK2, over hyped but ultimately not a top level defender
Ugarte is not a footballer, he's a destroyer at best but will look good in an inferior league like the french, he looks so far off the pace I genuinely don't think he'll adapt to the physical speed off the PL because he lacks technical ability.
Zirkzee is a futsal player at best, he's not quick enough or have speed of mind to play the fast paced PL, again looks good in serie a a slow tempo league, but PL is played at twice the speed and most games pass him by.
Only Mazraoui looks somewhat good enough but that's only because we've had such poor quality in the full back positions now for years that anyone that resembles a footballer will look good there. Still think defensively he's not good enough, okay in possession but against the top sides he'll be found out due to poor reading of game.