What I don't like about Mastodon is the way it federate servers. For example, if someone on server B "retweets" a post from server A, it does not carry over likes and comments from server A. That means personal instances are cumbersome and big servers always have a bigger leverage. That also implies you have no single page to just see all the comments about that post.

Bsky, on the other hand, does not have such hard splitting between servers (comments belong to the post on ATProto network, not to the instance) and allows you to run your own personal instances (PDS) natively. You can even transfer your profile and data (including followers) to other instances. IMO, it's a better tackle on building a federated social network.

But yeah, the native recommendation algorithm is lackluster.