You could check out ddocs.new
Very similar to gdocs interface but privacy-first and more customisable :)

All good ddocs.new has it + it's completely private ;)

Here you go :) You can add inline comments by selecting text or leave general comments from the top-bar menu

I can recommend ddocs.new as good alternative :)
It's more customisable & private, and doesn't have any intrusive ai

another good one free of all the intrusive ai is ddocs.new :)

There is dark mode on ddocs.new :)
It's quite similar to gdocs but privacy-enhancing

Quite late to this.. but have you tried ddocs.new? Super similar to gdocs interface but fully private, no mandatory ai, and more customisable :)

Oof very late to this.. but I'd recommend ddocs.new

It's privacy first (e2e encrypted), customisable (darkmode & other colours), syncs cross device, and has markdown support :)

They'll keep forcing intrusive ai on their apps as long as we keep using them