Paris SG, with its excellent squad, is the natural favorite every year, and that's perfectly normal. The French league isn't particularly challenging for them. There are some strong teams, including Marseille, Lille, and Monaco, but it's not difficult to beat them. This hasn't been a difficult situation for Paris SG at all. Lille has taken a trophy from them in previous years, but PSG has been the only strong team since then.
The French League will be challenging for PSG only when several teams in this league can create a team equal to PSG. Currently, PSG is one of the strongest teams in the French League and the richest club, we can say that PSG is the only one, in this case, this team will take all kinds of steps to maintain their continuous success. Just as they were the best club in the French League before, they are still the best club in the French League and this will not change in the next few years. On the one hand, things are easy for PSG because if PSG were a team in the English Premier League or La Liga, they would have to make a separate plan to do well in the league competition, but they do not have to do so in the French League. They start the season only to do well in the Champions League and their main plan is for the Champions League.
So long as the French ligue 1 is involved every other teams are underdog to Paris Saint Germain as they have no competition in that league, lille was fortunate few seasons past and I'm glad they didn't misused it like that of Dortmund in the germain bundesliga, lille took the advantage and won the league and I believe it's gonna last for a long time seeing another team winning the title instead of Paris Saint Germain, because they will dominate that league as long as they can, every other teams should just focus on securing a spot on the top four to partake in the European competition simple.