PSG may dominate most of the time, but keep in mind that even bottom clubs of Ligue 1 can make a difference of the title race-a scene perhaps not as frequent in other "big" leagues. Now with Messi, Neymar and Mbappe and Ramos the only thing missing is a strong stable opponent in the league, like Bayern has with Dortmund for example. Someone who at least challenges it year in year out. The problem is Lille Marseille Lyon etc, they perform one season and the next theatre out the window , sometimes not even getting into European competitions.
Teams like Monaco, Lille, Lyon and Marseille are very unstable indeed. For example, Lille won the Ligue 1 title last season. But now, we see them having a terrible season. This is because they don't have a lineup full of world star players like PSG. This prevents them from being consistent about their title competition. This is not fair for this league like the Bundesliga. We need to be seeing more competition.