There's no clear cut answer to the victim question
I agree @CupboardCop In a general sense, JA is a victim simply because pressure and stress has probably caused his death. That’s extremely sad. If he had additional issues (and I use ‘issues’ in a broad sense there) and didn’t receive the appropriate support, then yes, he’s a victim in that sense too.
However, in some part he seems to have contributed to his troubles by the decisions he made when questioned. Getting the police and Carter Ruck involved is what I find hard to reconcile with him being a victim. Not only was that unwise and unnecessary, it’s quite an ‘aggressive’ response, which contradicts the idea of him as an otherworldly fantasist. It seems a very knowing response, and, to me, implies he was aware of the fact he’d lied. So, not a victim in regard to this.
The question implies he has been hounded, more than a regular white male academic would have been. That for me is absolutely true. Should he not have been made into a diversity poster boy perhaps he wouldn't have been politicised and hounded so much
Some of the people involved are no doubt motivated by racism, eg Cofnas, and I’m sure that JA had been subject to racism during his life. Was he hounded more than a white male academic would have been? I don’t know, is the honest answer. I think that what mainly caused the media interest was the overblown lies. There was a whole list of them, ripe to investigate and disprove. Each day they seemed to dig up more proof: for example, JA had apparently said his leg had ballooned to twice its normal size by the time he’d finished his races. However, a photo was found of him crossing the finish line with his leg a perfectly normal size. I think the media would have dug up things like that for anyone who’d lied so prolifically, no matter whether they were black or not.
As you say, the fact that he was a poster boy for diversity complicated things because it made it also about race, when it wouldn’t really have been so much otherwise.
I also think that maybe JA was dealt with differently by others because of his race. Maybe they were over-enthusiastic or not wanting to make any negative comments or question him. This did him no favours, even if it was well-intentioned.