PSG domination in Ligue 1 is more severe than domination of Bayern Munich in Bundesliga. PSG lost less titles in domestic league than Bayern Munich lost in Bundesliga. In seasons they won domestic leagues, PSG have very strong domination in Ligue 1 and as you said, no actual competitor in Ligue 1 against PSG, while in Bundesliga, sometimes there are clubs that compete seriously with Bayern Munich even at the season ending they lose with big point difference under Bayern Munich.
This kind of strong domination in Ligue 1 is harmful for PSG when they play in UEFA Champions League because their star players are not familiar with tough matches and highest competitiveness. They are familiar with domination in Ligue 1 and lack of necessary concentration when playing in Champions League. Playing against giants in Champions League, lack of concentration within several minutes costs them a loss and it happens many times for PSG.
I agree about the dominance comparison between PSG and Bayern Munich in their domestic leagues. Bayern Munich have competition against themselves which is named Leverkusen.

But for PSG? There is none.
About the "harmful" part, I don't totally agree. I understand what you are trying to say. But did you watch both legs of the Liverpool matchup? PSG were much better, right? The new version of PSG isn't joking at all in the Champions League.
