It seems João Félix had a poor performance and his performance was weak enough to make Xavi mad at this player. Before João Félix joined Barcelona he said how loved this team and he wanted to play for Barcelona but this player mostly couldn't have good performances since he started playing for Barcelona,
In the game between Barcelona and Almería, the performance of João Félix was weak enough to make Xavi not use this player in the best squad in the game against Las Palmas.