If I'm really motivated I either just download the content (yt-dlp) or use duckduckgo search interface. It's actually not bad.
I started hosting Viewtube app hoping I'll catch up, but while it's quite amazing (surprisingly light and emulates subscriptions behavior for you), I had issues with it... So as for now I remain mostly cut off.
There is a lot of great dev and ops related content (conferences) that I come back for, but not for subscriptions I used to love.