I think not crediting current senior coaches with integrating young players to the enormous step up to the premier league is quite harsh.
Just to clarify, I said that what happened overnight was his fall off. He returned from an excellent season, where the whole club looked to be improving and genuinely performed about as well as bebe did at times. Ive never seen such a dramatic decline from a player without age/injury accounting for it.
The point was about improvement, so no it's not harsh. Unless you think that Mainoo or Garnacho markedly improved, in which case your claim could make sense otherwise it doesn't.