I also didn't expect Chelsea to be so strong in the final because before the match, Chelsea were really doubtful about being the favorites. But I was quite surprised when Chelsea were able to play a different rhythm in the final, causing PSG to lose their way because their tactics were completely out of whack. And if Chelsea can continue to do this next season, perhaps Chelsea will be a strong candidate to challenge for the Premier League title, as Chelsea will certainly be looking to buy several new players in this transfer window.
Chelsea were really doubtful? That's not true. In fact, Chelsea were more confident and you can see it from their pre-match interview where their players assured their fans that they mean business. Reece James said "we are going to win" before the match and the other one said "we are not Inter Miami or Real Madrid". How else can you define confidence more than this? The only people doubting Chelsea were other clubs fan base whom their clubs didn't make it to this competition. They doubted Chelsea not because PSG was better but because they hate Chelsea coming this far. Chelsea is a miracle club that always shock world when people doubt them.