After reading this it seems like only at least partialy feasible solution is qubes os and something like starting from previous snapshot so any installed spyware gets instantly wiped. Also, chrome is not allowed on computers in my home and will never be. I see no reason for chrome requirement by anyone.

My main question is - when Chromebook is SO annoying. Why wouldn't OP just sell it and buy more sane pc and use sane os. I'm getting vibes like chromebooks are mandatory or what (which would be so much not cool).