None of those players are at fault if those around them don't facilitate their game.
Sancho is a world renowned combination player, yet we isolate him on a wing without even a supporting full-back, let alone supplementary midfielders and attackers.
Varane is used to far better than what he's had here; it must be remedial to have to look over your shoulder so much rather than squeeze the life out of the opposition as the club he played for and country are renowned for.
We barely supply Ronaldo or play cohesive football, yet he's doing the best he can with the tools at his disposal.
The theme has to stop and us become a coherent and cohesive unit otherwise we'll never get the best out of literally anyone we buy. It's no coincidence not a single touted player has come here and improved; in fact they've all eventually dropped in performance and output and fallen in line with the status quo.
Tchouameni would, you'd hope, be a cornerstone of a newly constructed midfield and a core component in us being knitted midfield - you wouldn't him coming in to play with the cloggers we have in midfield, rather be part of a new and exciting unit.