Maybe see if ‘rclone mount’ solves the problem for ya. Rclone can often be a super handy swiss army knife for stuff like this.

Good choices. I too run Librewolf by default, with ungoogled Chromium standing by for the occassional asshat website intentionally designed to work exclusively on Chrome

If you buy a new Pixel and then run an alt rom like graphene or lineage, you’re most likeley costing Google money. I believe they manufacture the Pixel at a small loss because they expect to make their money back harvesting and selling your personal data. Denying them that should mean you get decent hardware at a fair price, without really “supporting” Google as much as you fear. I could be wrong, but I’ve definitely seen that mentioned before.