It has plenty to do with him he went out and bought a host of attacking players and neglected the back which is just stupid, arrogant or both.
There was all this talk of making wholesale changes thoroughout the squad and he goes and spunks almost £50mil on John Stones and calls it a day as far as the defence is concerned, it was beyond obvious that they needed at least two FB's and another CB. They currently don't have a stand out defender in the whole squad barring Kompany and he's about as reliable as a chocolate tea pot.
When you're having to play the likes of Kolarov consistently let alone all the games he's played at centre back then you've definitely failed in one way or another.
And then there's the calamity that is Claudio Bravo, as I said he's definitely failed to some extent.