It is normal to see PSG in this situation now. Because they have been making big changes in the squad. Mbappe was also nearly leaving and he has been integrated into the squad again after some issues between him and the team. They tried a trio without Mbappe first. Despite the dominance it didn't work out as they couldn't score a goal. Whenever Mbappe was in the game he made a direct impact on the game with his goals later on. As I said before he is the mainstay for now.
As long as they have him in the starting eleven their win percentage should be increasing by a high sum. But I don't have big expectations from them anyway as I need to see the adaptation process of the new players first.
That's not normal at all mate, even though PSG were left behind by some of their important players, they still have a lot of talented players in their squad, of course there will be changes, but I mean the changes shouldn't be this significant. We can see all this when PSG played matches against Lorient and also Toulouse in the first and second weeks of Ligue 1, how can PSG only get 1 point at home when facing Lorient? it's ok if their opponent is Lyon, Marseille or AS Monaco.
It is at least normal for their attacking area now. Because there aren't Messi and Neymar beside Mbappe now. Players like Goncalo Ramos, Dembele, Asensio aren't better players than them first of all. They are still talented players of course but they are in a new environment and they need some time to adapt to playing together.
For example we saw this need in the match against Lorient. There was a big dominance but no goal as I said. But after this adaptation process ends I will be expecting to see a much better PSG. For now they aren't a very credible team to bet on. But this is my opinion of course.