Revel is not a strong club, its name has never been heard of by football fans before. The big victory over Revel does not mean anything for PSG, the strength of the club led by Luis Enrique has not been able to be matched by clubs playing in the Ligue 1 caste, let alone a club like Revel that has never been heard of before. In Ligue 1 PSG is the king, no club has been able to stop it from winning the Ligue 1 title for the last few years, PSG will also dominate the Coupe de France with all its advantages. What PSG has just achieved is not very impressive for anyone, this victory is very natural for PSG because Revel is a very weak team.
I agree with what you said. No one had ever heard of Revel, except maybe the French. So it's not surprising if they were able to win that match. I think it would be surprising if they lost or won 1-0 against Revel. However, I still appreciate what PSG did because getting a big win means that PSG still has a squad that is strong enough to be able to dominate the league. I'm confused why they didn't field a second tier player against Revel?