You just can't compare these two directly - ActivityPub which is a W3C backed non-profit free protocol and software collection to Bluesky which is a single for profit american product with some open source components that could be decentralized. But even if you do, it's still underperforming despite being found directly to leech of users of an existing failing product (it's even the same founder lol).

Again, you can like Bluesky and atprotocol but to say it's on even remotely equal footing either in ideological or real sense to be "fighting activititypub" is just laughable any way you look at it.