I agree with your frustration but I think you will be beating your head against the wall if you don’t have a competitor to switch too. I would say about 90% of what I watch from my FIOS Provider is the OTA type channels. CBS, NBC, CW, ABC, FOX (not the DRM FOX). But I also have HBO Now, Showtime, Hulu, Netflix etc. that I get directly from the source (or via iTunes Subscription). My goal is to reduce as much as possible what I get from my Internet Provider (Frontier FIOS). My son is on TWC and he got the LOCAL Only Package which was $10 per month over the cost of his Internet Package and gets everything else like I do. Not all Providers offer a low cost local (non DRM option).
Of course the other option is we get some help from Apple and Channels is able to add DRM Support. But that is out of our (and Channels) control so if it happens then great but not going to count on it.