Or, he decided he had to protect the defence because he massively overthought it, as usual. That's a Pep problem, not a defensive problem.Guardiola is on the record as saying he played 5 at the back because he needed to protect the (shit*) defence.
*He left this unsaid.
Even then, we played shit, missed a bunch of chances including one of the all time sitters, then were robbed by a bent official allowing a goal that was both offside and a foul. Putting that purely on the defence is ridiculous