What non-google OS should I use (if at all)?

[yvmuell]

Its not that easy, however they could al least understand it exist

@hirnsushi

Now there’s apparently a bug in certain Qualcomm bootloaders (according to the CalyxOS devs) which affects the Fairphone as well that leads to the rollback never being reset. So on any devices (not only Fairphones) affected by that the only way is forward.

I don’t think Fairphone as a company has the necessary access / ressources to fix low level Qualcomm bootloader bugs,