Barcelona is a big team so anyone playing for Barcelona should be ready to deliver all their best because there are clubs that are not ordinary so it is expected that you be at your best because of the history of the club so any player coming to play for Barcelona should be ready to face the pressure and criticism
Same was said when big players joined Real Madrid, which we know as a rival to Barcelona, Real Madrid couldn't withstand Barcelona last season, now they initiated another big signing, also expectations are getting high. The first thought of signing for either clubs is how to be able to withstand pressure from own fans and rival fans, sometimes players fail at first season, exactly what happened after Mbappe signed for Madrid. This season will be tough for both Barcelona and Real Madrid, last season was an easy one for Barcelona, depending on how many El Clasico , Madrid will win some while Barcelona will also have wins.