He's been a first choice CB at this club for years now. Over the last 2 and a bit seasons we've shipped 173 goals, currently we're on 46 with only QPR (52) and Burnley (47) worse. We shipped 59 last season and 68 the year before that and he's been the captain and presumably first name on the sheet. We've defended horribly as a unit and he's been in the thick of it more often than not. His personal performances are declining rapidly and it's not too unexpected that, given his position and stature, he's getting grief.
Not saying he's the only one culpable but we've been dicked far too often.