Ah that team has been in decline for 2.5 years. Their inbounds have not been good enough (22/23 an absolute disaster in terms of who left and who arrived, bar Haaland of course). Over the past 2 seasons age has also been catching up with some of their players (injuries and legs) and this season they have fallen off a cliff (and Gundogan returning has been a foreseeable disaster) just as Hendo, Mane and Fabs did.
Letting Palmer & Alvarez go were imbecilic moves, maybe Porro too. De Bruyne is 33, Walker 34, Gundogan 34, Silva 30 and another 7 at 29-30 all of whom will need replacing in the next 2-3 seasons. There is a massive transition job pending. Bobb their sole bright star.
They lost or sold Fernandinho, Sterling, Aguero, Sane, Kompany, Laporte, Mahrez etc. and replaced them with players such as Grealish, Akanji Doku, Phillips, Grealish, Nunes and Ake. Alvarez for Aguero but then let him go !
I'd give Gvardiol a bit more time to come good.
Overall there is a clear drop off in quality there. Pep is clearly to blame for this demise and long may it continue !