By recollection, sentiment seemed to turn against him when he publicly stated he was talking to the client journalists who work for United and Liverpool - hacks for hire like Delaney, Harris, Panja, etc - to understand their ‘expert opinions’ on the whole UEFA charges/CAS situation.
At around that time he did start leaning into some of their more unpalatable tropes and in particular the more egregious, ill-informed and agenda-driven lies about our Club that client journalists like them work so hard to propagate, from which point a lot of City fans stopped trusting him and saw his as part of the anti-City agenda. The team he supports didn’t exactly help him out here either!
Up til then, even though people knew he was a United fan they seemed willing to give him the benefit of the doubt.
From that point on - he became the enemy in the eyes of a lot of City fans.