Tottenham could have won the match if they had performed a little more carefully in the last 10 minutes. We know that big teams like PSG, Barcelona and Madrid increase their attack speed in the last few minute of the match. Tottenham lost the match because of their tactical weakness.
I agree with you that PSG will face a difficult situation this season. But in the previous season, on the Champions League platform, we saw that their performance at the beginning of the season was quite weak. Even qualifying for the playoffs was completely uncertain for them. Even then, the team performed well until the end and won the Champions League title. I want to trust Luis Enrique
I think Tottenham Hotspur already tried their best but PSG are strong and experienced so that they were able to make differences in last ten minutes of the match in official 90 minutes. PSG scored two goals from their good performances in those situations and I don't see really big mistakes from Tottenham Hotspur. They simply were beaten by a stronger team but this defeat is still a big lesson for many players in Tottenham Hotspur.
By winning UEFA Europa League title last season, Tottenham Hotspur will play in UEFA Champions League this season and have to play with many big clubs like PSG. They must analyze their performance in this match and try to make improvement if possible as they must prepare well for coming matches in Champions League.