There are some real beauts in here.. He has scored more goals than Chelsea, and has three goals less than us. Somehow he makes City worse, and is responsible for them concede more goals.. 13 more goals, and he is the all time premiership goal scorer.
I don't see that there's a straightforward argument that he's "responsible for them concede more goals"? Why would he be the one responsible for that, particularly?
It's true however that for most metrics (except goals scored), they're a little bit behind last year (understat):
Category................21/22...........22/23
Goals pg................2.61...............2.87
Goals ag pg...........0.68...............1.00
xG..........................2.46................2.33
xGA.......................0.66................0.92
Points pg..............2.45................2.33
They've changed their game quite a bit: More emphasis on exploiting breaks, more direct attacks, and as a consequence also less possession, less control and more defensive risk. Maybe that will bring better results over the course of a whole season and maybe it won't, but it's not surprising that it brings some adjustment challenges that takes time to learn how to deal with as a team. And the advantage is it makes them much less predictable, and hence harder to deal with. My guess is it will push their top level higher, in the long run.