Little off topic but this kbin.social site seems really nice. Very short and clear privacy/terms, very good default settings, nice design. Slow though.
If i understood correctly the migration brought lots of users that were not expected and the instance is getting overwhelmed. It should get back on its feet if they mindfully upgrade it
That's probably it. I noticed that it's not slow per se but it fails a lot. When it works it's fast enough.