It was a real problem. I used to keep hundreds of bookmarks I felt forced to check out, tag and archive. It was mentally draining and time consuming. I was never satisfied with the way I sorted them and I would often move them around, trying new categories and labeling strategies. Overall, I likely spent more time managing bookmarks than reading their content. It wasn't sustainable and I ended up deleting most of them.

Now I keep it to the bare minimum:

1) Favorites bar: up to 10 websites I visit on daily basis.

2) Inspiration folder: where I put things I like. 330 as of today. Website layouts, painters, dev blogs, Youtube videos, anything that has good vibes. That's the only criteria. I make it an effort not to add any subfolder. The only exception is "Favorite projects" which is my little Hall of Fame for quality content. https://ciechanow.ski/ is up there.

3) Trashcan folder: where I place temporary bookmarks I don't care about and will delete in the next few days.

I periodically export my bookmarks so I don't feel guilty when I delete entries from the browser. You could do the same. Put the exported files in a usb stick and forget about them.