I don't know the reason why some people say PSG's performance this season in Ligue 1 is so bad, even though PSG was unbeaten until week 14 even though they only won 10 matches. Just because of a draw some people say it is bad, but the fact is that no team can maintain its run without a draw in a season.
PSG have drawn 4 games this season. Last season they ended the league with 10 draws and 2 losses. So I think they are still at the same level as last season. I agree with you that no team can keep winning games. But maybe 2 consecutive draws against teams in the middle of the table seems to be the reason why some people say PSG are doing badly. But I think PSG are still very strong and dominating Ligue 1 this season. They are 5 points ahead of Marseille and they are still unbeaten.