If you want a private desktop OS you either use a debloated Windows which can break, or Linux but it’s not always easy to use, but I’ve never heard of anyone use a de-googled Chrome OS, smth like Graphene OS but for desktops. I’ve actually never used Chrome OS but to my knowledge it’s open-source, easy to use and can already run Android apps making it a strong option
there are a bunch of easy to use linux distros that dont require good will from google to work but if you need it to be google related i think chrominum os is about right.