I agree with you, the result of this match is influenced because their levels are at different levels. Monaco is good, but Paris Saint Germain is better than them, and in Ligue 1 I don't see any team that has the same level as Paris Saint Germain. This is why in the end Ligue 1 is not more popular, because the competition here is very minimal, and we can even predict who will be the champion in the next season. Not without reason, because as you said, Paris Saint Germain has everything it takes to be a champion. They are a club with all the advantages that other teams in Ligue 1 don't have.
That is why I say Ligue 1 is not so competitive because when it comes to competition only PSG is the only strong team that might have an impact to dominate the league and overall there are almost no other teams that are able to provide balanced resistance in the struggle for the title. The PSG level is above the average team there and even challengers such as Marseille and Monaco are only able to compete for the second to third standings.
The level of popularity of Ligue 1 is not too bad but not many people may have an interest for this league for some reason where there is no more competitive competition. PSG has everything while other teams are unable to make efforts as made by PSG.