I would say PSG didn't give up even after going 2 goals down, the last stages of the game really changed everything and turned things around for them. The way PSG was playing in the game, I didn't even think they would score a goal but they finally proved me wrong. Tottenham is actually to be blamed for this set back because they almost had the trophy to themselves.
Tottenham made impression but they are not an opponent that can make PSG fearful. They led with two goals until the 85th minute since that PSG started their come back. PSG played well against many stronger opponents in Champions League last season to win that trophy and their mentality actually has been better a lot since the last season.
Tottenham has reasons to feel disappointed by losing this cup when the match was going to very last minutes but they don't have to feel too bad. Losing to a strong opponent like PSG is not too bad result but Tottenham can use this good performance with PSG as a foundation for their performances in Premier League.