Mbappe has been too much praised since his arrival and now when those expectations are not met then Mbappe will be mocked and that makes Mbappe even more difficult with the burden he is carrying now.
I think that is also reasonable because Mbappe deserves to be blamed after his performance has not improved so far and even Mbappe's penalty failure made Real Madrid have to experience another defeat.
Not intending to find fault with one of the players, but in fact now, Mbappe has failed to contribute to the Real Madrid team even though he is a football star who is highly expected to make the team much better but the opposite happened.
Mbappe has indeed failed to execute penalties twice and it is very reasonable to highlight because in the match at Athletic Club's home ground Mbappe should have been able to score the goal on the penalty opportunity which at least could have given the score a draw for Real Madrid. But it was in vain when he was not very good at taking penalties so Ancelotti had to look at other players for that because Mbappe is not a good executor for penalties. And what is quite unfortunate is that this defeat has certainly given Barcelona another opportunity to remain in first place in La Liga for now.