I’m not on the main pixelfed.social instance but mine went down for a bit this morning. I just waited a bit and then I was able to login again.
Mastodon and Lemmy also had a lot of trouble even they experienced these huge waves of migrations partly because no one had scaled the software this far before
I’m using the android app and I’ve found it decent. I think the UI/UX could use some quality of life improvements but it’s a simple and straightforward app to use.