Majority of people underestimated PSG in the beginning of the competition. PSG struggled to their last match in the group stage and they have to win that match to enable them qualify for the play off. They became bold and confident in themselves.
Nobody saw them to be the favorite even till the finals. It was when the match started that we saw a different thing entirely to the opposite of our predictions. Barcelona super form ended in the semifinals with a strong fight against Inter but got defeated.
Yes, I did too. Nobody rated PSG high enough until the eliminated Liverpool in the round of 16. Nobody expected that because Liverpool had the best results out of all participating teams in the league phase. I think winning that game showed them that they can beat any team if they decide to do it. That's why it's always wise to stay focused on the task at hand even if you didn't have the best starts. The fastest horse doesn't always win in the end.
Also, I love a good underdog story such as PSG winning their first UCL and Atalanta stunning Liverpool in the Europa league a few years ago before going on to hand Leverkusen their first loss in their unbeaten season in the UEL final last year.
However, in the match between Liverpool vs PSG, I considered Liverpool as the favorite team and last season, Liverpool was one of the top four teams in the Champions League for me but they could not show a very good performance. Since PSG defeated Liverpool, I started expecting something good from this team and gradually PSG performed well and defeated bigger teams. The biggest obstacle for PSG was Real Madrid and many thought that PSG would not be able to win against Real Madrid but they defeated Real Madrid and ensured the desired final. Inter Milan was the opponent in the final and Inter Milan is a team that has performed well so I was watching the game thinking that it would be a tough competition in the final but PSG performed well against Inter Milan individually and they defeated Inter Milan by a big margin in the end.