Seems to me that BSV devs are just defecting to BTC because there's way more money flowing in Ordinals / BRC20. I could of course be mistaken.

But LTC and DOGE are now facing similar issues with spam, blockchain bloat & network congestion so I'm inclined to believe its not an anti-BTC conspiracy. I think its just a case of the blockchain-agnostic degen crowd following the newest trend. And it will die down before too long, probably within 3-6 months. Unfortunately it will have long-lasting consequences.