I know the anxiety you're referring to. I eventually started aggressively pruning my to-read list every once in a while, deleting articles that looked appealing

I know the anxiety you're referring to. I eventually started aggressively pruning my to-read list every once in a while, deleting articles that looked appealing when I came across them and impulsively hit "read later" but on more sober inspection no longer seemed worth the effort. No more anxiety, and this way what I end up reading tends to be worth it.