Not that annoying - but I had to write my own server to get the, admittedly peculiar, user interface I want.

So not only do I run a single user server, I am also the only user of the software it runs ;-)

The most annoying thing is that every Mastodon server your server has ever talked to keeps sending your server messages about accounts that have been deleted. I don't really care, and I don't think there is a way to tell them to stop.