Actually pretty much all Linux computers run on Intel or AMD chips both of which have a firmware level backdoors in the form of the Intel Management Engine or the Platform Security Processor - so if you use a computer you pretty much can't avoid it - the best approach would then be to throw away all microchip based tech and start a sustenance commune to live off the land (until the techbros enslave you in their VR prison with the help of robotic AI mercenaries when the water wars start)