Numerous ridiculous comments in this thread.
For starters, PSG are the best club in world football at present, but best club ever - no. The best club ever is debatable but for me was Barca 2010-11.
Next, the claim that we are very close now with our present squad to PSG and would be favorites to beat them - total nonsense. We are good going forward but struggle on defense. We give opponents numerous chances to score against us. PSG would rip us apart. That said, we do seem more capable than PSG against a low block defense - Doku, in particular, can beat 2 defenders at once, creating numerous goal scoring opportunities. By way of contrast, PSG struggled to break down Arsenal's low block, creating very little.
A big factor in the final was Arsenal's early, lucky goal. Once Havertz scored, Arsenal parked the bus making it extremely difficult to score against them.
For me, the best sides in world football right now, are:
1) PSG
2) Bayern
3) Barca
4) Arsenal
We are still rebuilding and have a bit of catching up to do. On top of this we have a new manager and many stalwarts (Silva, Stones, etc.) are leaving. I think we'll be better next season, perhaps good enough to win the league.