You're right. And there are many other crucial games Messi didn't show up and his teammates saved him. The Champions League Final in 2015, Barcelona won 3-1, the goals were scored by Rakitik, Suarez and Neymar. In that match Messi was poor.
2015 Quarter Finals. Barcelona 5-1 PSG. Hatrick of Neymar and two goals of Suarez. Once again Messi didn't show up.
2015 Round of 16. Manchester City 1-2 Barcelona. Messi didn't show up again. Suarez scored two goals and gave Barcelona the win, Messi missed a penalty.
In the 2015 Champions League Neymar and Suarez were definitely way better than Messi, they both scored many more goals than Messi in the KO phase and in the Final.
In 2017 Barcelona lost 4-0 against PSG in the first leg, then in the second leg they won 6-1 with an incredible performance of Neymar, who score two goals and gave two assists, Suarez scored one goal in that game, and Messi didn't show up at all, we didn't even notice Messi was playing in that game against PSG. Neymar completely outshined him
2009 Semifinal. Chelsea 1-1 Barcelona, Iniesta scored a goal in the last minute and thanks to that goal Barcelona won and qualified for the Final.
In the first leg the result was Barcelona 0-0 Chelsea. So without Iniesta's goal Barcelona was out of the Champions League, Iniesta saved Barcelona and Messi. Without Iniesta's goal against Chelsea, Barcelona wouldn't have won the Champions League that year.
Copa America Final 2021, Argentina 1-0 Brazil, Di Maria scored the goal, and Messi was terrible in that game, his performance was awful.
So the conclusion is Messi didn't show up in so many games, and got saved by his teammates plenty of times, Neymar, Suarez, Iniesta, Di Maria...
Messi won 4 Champions Leaugues? That isn't true
In the Champions League that Barcelona won in 2006, Messi got injured in the first leg of the round of 16 and didn't play anymore, he was a non factor, he wasn't part of the team because he missed so many games.
Messi contributed nothing in the Champions League of 2006. Ronaldinho and Eto'o were the stars of Barcelona, they were the two players who gave Barcelona the Champions League in 2006 while Messi watched all the games on TV at home.