I can relate to this. I created SuperFocus (https://chrome.google.com/webstore/detail/superfocus-stop-sc...) with a similar idea. Dopamine loop is a big problem. I have tried site blockers / SuperFocus which is a feed blocker but there was something missing and have been looking for the magic solution. Just signed up for Clearspace and immediately felt this is it.

Planning to rewrite SuperFocus later this week to do the same on desktop as most of my time spent is on the desktop browser.