Who I have the same questioned this topic

FIOS TV One Mini & DVR units were great up until a few months ago.  Slow channel changes, distorted picture (black and color lines/blocks) and picture freezes constantly on certain channels - of course this happens on the channels I want to watch!  No picture quality issues while watching On Demand shows or Netflix.  I've used the phone app to troubleshoot and resolve to no avail.  Online chat via Facebook messenger was a waste of time as it resulted in no resolution.  I provided video footage of the actual problem.  Calls to the business office and technical support has resulted in 8 hour hold time and NEVER connecting to a representative.  I've unplugged all devices, unplugged the coaxial cables and reconnected, along with resetting router, ONT and all 7 boxes - ALL TO NO AVAIL.  Any suggestions on a fix for this annoying problem??  Since Verizon has been unable to solve the problem using its remote technical support it seems the only option left is to say good-bye to FIOS TV and return to DirecTV.