Some are talking about problems overcoming the parked bus/low block. Not the issue, we've struggled against average teams that attack us too. Liverpool, spurs, sporting, feyenoord, PSG, Madrid, Arsenal (away) and so on.
My take is that it's the lack of goals from the midfield. Particularly in the PL, Grealish 1, Foden 7, Doku 3, Savinho 1, Gundogan 0, Bernardo 3, De Bruyne 4. Gvardiol has 5 PL goals from defence. Fixing that will go a long way to fixing the team. I haven't checked assists but I suspect it's equally piss poor.