He was at Scunthorpe, a club operating with a tiny budget in League One. During his tenure, they avoided relegation to League Two, finished 3rd and 5th before they started declining (which IIRC was when Swann stopped putting his money in). Not sure how any of that was his fault.
He joined Notts County *after* their winding up order had been issued, despite this he was there when they were promoted to League One and left shortly after they went down to League Two.
He might be a massive bellend, he did play for Boston United and their fans are ****ing idiots, but he'll be judged on what he does at City and no more.