There is a mindset where each bookmark is an implicit obligation, and they of course pile up faster than you can go back and peruse them to your satisfaction, so this understandably leads to an unpleasant feeling of unfulfillable obligation.

After getting into all the second brain stuff and trying out quite a few ways of organizing this kind of information, I've started to think very carefully about what sort of implicit commitment I'm making when I write something down. I use a system of tags for things I need to look at later in some way, and I almost never tag links, but I often search back through them to find something particular that comes to mind, and I'm glad I store them.

Maybe you would have success reorienting your perspective to feel like "just" bookmarking is enough, such that there's not an implicit responsibility to come back and do something particular with the bookmarks? Or if you want that responsibility, that you can have one kind of bookmark that you're "just" saving, and another kind that you are okay committing to review?

Then it might become clearer just by the size of the folders if you're "assigning" yourself an impossible amount of work.