This is the biggest disadvantage of the French League for Paris Saint-Germain. Because there is no team that can challenge them in the league. As such, Paris Saint-Germain is having a hard time in Europe. Because they are used to facing easy opponents in the French league and when they face a strong opponent, they struggle. Now their opponents are Liverpool and their job is very difficult because Liverpool is the favorite for this year's Champions League. This match will be a real test for Paris Saint-Germain.
I think this is beneficial for them because if a difficult team manages to beat them on defeat, in which PSG can't pressure them with their good performance, it will be difficult for them to win this league. They should play well against every weak team and score as many goals as possible so that they don't find it difficult to play against the tough and strong team and win the match easily. This will make it difficult for them to win because Liverpool are a really strong and pressing team which will make it difficult for PSG to play with them. Their players have to work hard to create a wave of struggle in themselves so that they can score maximum goals and win the match. The matches between them will be quite interesting as PSG will also play hard and win the match.
Not having a formidable side in the French League to give them tough challenge might have made them unprepared to face stronger teams in other leagues. Liverpool is arguably the best team currently, judging from the Champions League performance. But this is the game of champions where nothing is impossible. PSG has a good squad that can give Liverpool a fight. However, the English side is the favorite in this game.