Sorry, I've only just seen this.
He got the Bath job by stabbing Gary Gold in the back.
Allegedly, he undermined Jonno's authority as head coach - though that may have had as much to do with Jonno's desire to be a manager than head coach anyway (the same accusation was then flung at Andy Farrell towards Stuart Lancaster).
He actively undermined Brian Ashton in public ("the management of this team is a dissgrace" "we've no world class players" "the players are basically coaching themselves") in the build up to the 2007 World Cup, and is thought to be a large part in Jonno getting the job (with Ford as defacto head coach).
The allegations of his time with Ireland were of a split coaching staff with a power divide - I've no idea on veracity though.
I don't think anyone's ever claimed that Mike Ford is a bad coach - it's patently obvious that he isn't; what he appears to be appauling at is man-management. He seems to leave division in his wake wherever he's been; and has a history of coming into a coaching job, and miraculously becoming head honcho within a year as the incumbent is ditched (Ashton, Gold, Dominguez). Even at Saracens he got that promotion within 12 months, though if there are any rumours of backstabbing there, I haven't heard them (or have forgotten). The only place he ever seemed content as an underling was under Martin Johnson... where Ford was head coach in all but name; the only Head Coach / DoR who survived having Ford as his underling is Eddie O'Sullivan.