PSG can claim the French Ligue title much early before the season comes to an end. I doubt there is any team team that can stop them from winning the French Ligue title. Both Marseille and Monaco has been in form form this season but I don't think they can compete with PSG for the title.
That's what makes this league not so interesting because PSG can claim the title much earlier before the season ends so the league competition is not so competitive. It is difficult for any team to break PSG's dominance and that is not at all the competition that football lovers expect. To be a competitor for PSG in the fight for the title, it takes a balanced player strength and that is not possessed by Marseille or Monaco so it is difficult for both of them to compete with PSG.
You have a point, I just don't like it when there are no competitions in football leagues. This season too, we all know the winner already when we still have months to the end of the season, it shouldn't always be like that, fierce competition keenly competed is always interesting. Still, I absolve PSG from any wrongdoing but rather commend them for holding that top position for too many years while others look on. It's now a wake-up challenge to other clubs in the league, they can buy players and change coaches. PSG doesn't have two heads so they should be ready to break the jinx like what is happening in Serie A.
I'm not sure yet but maybe the solution for having more competitions in the French League is to have a more rich owner for the other teams as they have than in PSG. Since they have good a rich team in PSG they can have much better and more expensive players and coaches which makes PSG a much better team than other teams.
That's why even if PSG is not in the good for many other teams like Marseille and Monaco try hard they still can't have a fair competition with PSG.
Recently we saw rumors about Marseille and maybe the Arabs are interested in buying this team and hiring some superstar players for them but this team but until that time I don't think if we can see any competitions in the French League.