I'm not surprised by PSG's defeat against Monaco, especially since SPG has a crucial match in the next three days against Bayern in the last 16 of the Champions League. but at least, this defeat was really embarrassing for Galtier who couldn't maximize the performance of his troops. I'm starting to doubt, with what Galtier applies. supposedly, this match could have ended in a draw or at least PSG lost by a narrow score.
In this match, Galtier again tweaked his formation with a 3-5-2 pattern. and again, the PSG players struggled to adapt to what Galtier wanted. the absence of Mbappe and Messi clearly had a huge impact, it was evident that PSG had a very difficult time keeping up with Monaco's game. even Monaco has a much better chance than PSG, they have 19 total shots, 9 of which are on target. meanwhile, PSG only had 7 total shots, 2 of which were on target. as a result, PSG had to be humiliated a second time like the PSG match against Lens.
Talking about the Champions League match, I can't speculate much that this match will feature an interesting fight from the two teams. but at least, Bayern have an advantage if it turns out that Mbappe and Messi are absent in the game later.
I think Galtier is having trouble making players run the system he wants them to run, that much is true and I would put majority of the issue on him. However, we need to also look at the team and how many players they put on bench and then put in. You don't sit kimpembe and hakimi down for example, what was the reason to do that at the start?
Plus, they still had some good players to beat Monaco, they weren't some "farm league team" neither, they were actually quite good on paper, so they should have been able to beat and won against Monaco and yet they failed. I hope for their sake they are not this bad against Bayern, they really need to play much better.