As we know, Eddie buttered up any adult in sight shamelessly before dropping Wally and The Beaver right into a mess. What we fail to realize is that while their other saboteur friends were far more destructive than he was, Ward and June hated him like fire while letting the others off with a "get our sons into a mess free" card because only Standards And Practices kept them from saying "Our asses are for sitting, not kissing." It's his transparent phoniness that made him The Bad Friend because the show runners hated his being a blatant fraud. The funny thing about that is that the show-runners also took special care to remind us that Ward and June weren't perfect by any stretch of the imagination. Ward could be too hasty and June was clearly too damned worried about what the neighbours might think about the daffier trends their kids adopted to really be effective sometimes. These were presented as flaws that hampered their efficiency in dealing with a younger son who never seemed to bother learning from history.
This distinguishes them from Elly and her claims of perfection. Since Elly is now The Best Mother Ever trying to get the Worst Kids Ever into shape, it stands to reason that she be hampered in her quest by an example of Uncaring Parenting. Gord's parents don't love him enough to scream at him all the time about trivialities, deny him reasonable demands out of spite and also to save face, fret endlessly about things she doesn't understand or like, be a brick wall of judgmental malice when he needs encouragement or sympathy and to dismiss his emotional concerns because nothing that happens when a child matters. Yes, since their parenting lacks the perfect absence of actual parenting, he's clearly a demon spawn come to tempt Elly's son away from fealty to someone who works tirelessly against his best interests.