Kylian Mbappe was star performer of the night but you can't take away the fact that all members of the team played important roles in helping the club beat a strong European club like Manchester City.
Yes, he gave good evidence with 3 goals. Man City was destroyed with possession. Man City were ineffective so they lost. Losing and failing to qualify for the last 16. It seems that this is Pep's first bad record during his time with Man City by not qualifying for the knockout phase. Man City's defense is bad, I think Khusanof can run fast but he failed to compete with Vini and Mbaape. But the injury problems of Haaland and Stones seem to affect the team's condition. It seems that Madrid is a little lucky because Haaland and Stones are injured.
Pep Guardiola's worst record this season is probably due to their poor form in their domestic league and in the Champions League. They ended up in the Champions League with a poor performance by Manchester City who lost badly to Real Madrid. Of course, the Manchester City players were much more aggressive than the Manchester City players, especially the incredible attacking duo of Vinicius and Mbappe. Mbappe's performance was very good, he managed to score a hat-trick, which resulted in Real Madrid scoring six goals in the two legs. However, since Real Madrid have qualified for the round of 16, it is more confident for them and they will try to attack harder in the next matches. Moreover, Real Madrid will definitely play better against their next opponent because Real Madrid is confident in the Champions League.