He drew poorly even though his shirts sold. He pushed himself to meet self imposed expectations of how he should have been carrying the company, leading him to be mentally and physically exhausted.
I believe he crashed a car when he fell asleep behind the wheel.
He got into it with Kurt Angle twice (one week Angle and Luther apologised even though they felt Eddy was in the wrong, the second time saw Angle frontfacelock Eddie and keep him face to the ground until agents stepped in. I believe Eddie and Angle got called before managment to settle things and shake hands to settle matters).
When a handful of German fans started chanting "Eddie Sucks" at a house show, Eddie, rather than play along and act like a rudo or even ignore the chants, took offense and screamed over the house mic, "Eddie doesn't suck, Germany sucks!" which is not exactly a slogan you want associated with a face champion.
His health suffered following the gory bladejob he did to put over JBL but he refused to go to the hospital, which led to his system going into shock since he was missing vital pints.
All in all, he pushed himself to hard to try be the champion he thought he should be and ended up becoming a champion that managment felt bad about putting the belt on in hindsight.
Edit: Missed out part of the fourth paragraph.