Also consider - don't sign in to YouTube. Set uBlock, and Sponsorblock, too - so when youtube does get watched, the ads and promotions get skipped.
Everyone here is missing the point - by signing in to YouTube, you give Google more power to dominate your life.
With a simple inoreader extension in Firefox, you can visit a youtube/youtuber/video page and subscribe the feed.
Search interesting channels and save them to Feedly, or Inoreader.
Pin those to Firefox, so that your feeds are always refreshed and visible.
It's important that you move on and stop focussing on the past. It can be painful, and usually it is fruitless.
After 12 years moving to a new town in the UK, I realised that so many of my friends and contacts had basically disappeared - moved away, or got into relationships so that family life kept them away from pubs I used to frequent.
It's rarely something personal, often people just move on.