Do what I do: just clear out your backlogs once in a while. Be heavy-handed and learn to ignore your Fear Of Missing Out.

They're not like your Jira backlog that someone requires and expects you to work through in its entirety.

They're just lists of things that are "interesting, but not interesting enough to watch/listen to/read right now". So clear them out, I bet you've had some stuff on there for over a year. I know you probably feel some attachment to them, but try clearing out one of the backlogs and see how you feel about it.

I learned this when I accidentally nuked my backlog of open tabs in Firefox, which had lots of things I wanted to get around to checking out in depth. I discovered that I didn't really miss most of them, and the few I did miss, I could find again from memory.