I got a Firestick and really only need MTV, AMC, MUCH, Food Network, TLC
Digging into the world of IPTV and it seems there's zero continuity of opinion between these services. I just need something with a good Program guide that will run without buffers on a fire stick
Then you need a legal subscription. No gray-market iptv service will provide what you want. It's gray-market for a reason, it's not legit and as such you have to expect problems. That's the nature of the beast.