According to the papers he's sexist, he's a druggie, and he wanted to marry his own cousin.
Of course, there's no real proof of him being sexist, the drug allegations are just that, and it is perfectly legal to marry your cousin (if indeed that is even true too).
Cher is allegedly a bully, an underage drinker and a proven liar.
Matt is allegedly a love rat, has dabbled in drugs and has (according to some) an attitude problem.
Everyone has their detractors and everyone has their flaws. Why they should cost only Wagner votes is anyone's guess.
Let's not forget that the judges themselves have skeletons in the closet, 'scandals' or are less than honest themselves (closet being the operative word with the Simon rumours

)
Cheryl is a convicted criminal.
Dannii posed nude in Playboy to pay off 'huge' debts.
Louis has proven links with previous acts despite acting as if he didn't know them (The Conway Sisters of S2 actually sang at a member of Westlife's wedding the previous summer).
I don't hold any of this against anyone, but the media efforts to knock Wagner into the bottom three are so transparent.