Ligue 1 can be said to be competitive without counting PSG. PSG has always been the most dominant in Ligue 1 for a long time. There are not many teams or even no teams that can really compete with PSG in Ligue 1.
Ligue 1 which is taking place is quite competitive I think in the 2020-2021 season. At least at that time, the top 4 standings competed with a small point difference. Lille managed to win the Ligue 1 trophy with only 1 point difference from PSG.
If other teams are unable to find new owners who have strong finances to overhaul the team, It will be difficult for other teams to compete with psg every season. Let's see how aggressive the psg owners are in every transfer market, where psg management is given a lot of money to recruit quality players into their team, while for other teams they are unable to do so.
So it is not surprising that psg can dominate Ligue 1 every season, Especially since they have many quality attackers and also a defense line filled with strong players in maintaining their performance to prevent opponents from breaking into their goal. Like Marseille, Monaco and Nice, They only compete to qualify for the Champions League, they do it every season but compete in the title race they are unable to do it.