My Gmail plugin is coming from the same pain (I subscribed to a ton of great newsletters, but they clutter everything human): https://www.getbreef.com . It's just my side project, and it's in beta - let me know if you'd like to try it.
It gives desktop Gmail an RSS-esque topic view of your inbox, and lets you infinite scroll through emails like you would Twitter or Insta.
It gives desktop Gmail an RSS-esque topic view of your inbox, and lets you infinite scroll through emails like you would Twitter or Insta.