Bit harsh IMO. Very tough ask to hold the ball up against 3 CBs, especially as Willian was very poor for me and Morata was totally isolated. In addition, Morata made several excellent runs but Willian failed to even attempt to pass him the ball, which was part of the reason why he was so tired. Once Hazard is back and/or Cesc comes into the team, he'll improve a lot I'd expect. He obviously should have buried that header though.
Conte's system asks a lot of the lone striker so Morata definitely has a lot to learn, and he has to improve his fitness as well. From what I've seen though his class is apparent.