It sounded like a lot of people didn't like him, partly from his habit of punching out pitchers who threw at him. A guy whose own teammates goad a pitcher into hitting him, knowing his reaction, doesn't sound like someone who will get glowing references in others' interviews.
Otherwise, he seems abrasive, but no worse than a lot of others who don't have the rep.
So there's not a lot of motivation for a reporter or Bill James to do the work to check up on casual allegations and rumors to set the record straight. "If he wasn't malingering, he probably did something worse that he didn't get caught for."
Thanks, csh, for your fine research.