I think it's pretty clear that it's WWE that Martha hates rather than pro wrestling in general. She happily accepted on Owen's behalf when he was inducted into the Thesz/Tragos Hall of Fame. Also, my recollection is that the bulk of the vitriol directed at her was in the mid-late 00s. That was the period when WWE was releasing DVDs centered around classic matches, expanding their circulation beyond the hardcore tape trader community. At the same time, it was nothing like today where just about anything you'd want to see is available online at the drop of a hat. So if a match wasn't on an official WWE release, it was beyond the reach of most fans. And a lot of fans have been trained to see wrestlers as comic book or video game characters rather than human beings. To them, not being able to watch Owen's matches was akin to not being able to play as Mileena in Mortal Kombat 11. That doesn't justify the way those fans treated Martha by any means, but it makes it maybe 1% more understandable.