Yeah. I get it.Not every trending story is a psyop, especially not when the 'story' has documentation for events going back several years. And it wasn't trending in national media, it was just popping up in certain sections of twitter, typically battle-of-the-sexes type accounts.
While I don't know this couple in particular, I do know this dynamic. It's very real, very toxic. Personally, I think there was something off about their environment that led to 1) his intense rage and 2) her reoccurring breast cancer.
Just as it's not wise to take everything read about at face value, I don't think it's wise to assume that every store that pops up is a nefarious psyop.
If it's just as we saw it, then I think you are spot on about the actual environment being toxic.