Sorry to hear about these buffering problems. That can be really frustrating. It is difficult to pinpoint core problems given the numerous configurations and technologies in play. I’ve been more fortunate…I use kodi, cinema, cyberflix, titanium, morph, and stremio for streaming. I subscribe to real debrid. I have two IPTV services, tpk and ks hosting packaged within iptv extreme. I use a comcast modem/router and my internet plan is 200 mbps. And I use ipvanish at all times. There are 3 adults and 2 grandsons ages 13 and 10 using fire devices, tablets, computers and a ps4 on a regular basis. And we only experience intermittent buffering issues. It’s been this way for quite some time. The iptv services do blink and stutter from time to time but usually only one at a time. If I experience buffering using any of the above streaming apps, I try another provider and/or switch video players. If that fails, I move on to another app and try again until I get my show or movie. This all happens within a matter of minutes. It’s been a very long time since I had the kind of buffering issues that ruin the streaming experience. With all the activity in my household, we come very close each month to eclipsing the 1TB comcast data cap. I restart my modem from time to time because it does become sluggish which affects the entire household. I mostly stream using a fire tv 2nd generation and fire tv stick 4k. I’ve been unimpressed with my fire tv 4k with ultra hd.
I cut the cord 2.5 years ago when after 20 years with Comcast, they sent me a contract renewal notice for $230 per month. I had no use for 80% of the channels included and the movie offerings were slim at best. Customer service was pretty shoddy. Their internet was/is far superior to anything else in my area. No one should work for free but if you want to satisfy and retain customers, then you’d better listen to your customers and adapt to changes in technology and give them a product they can use at an affordable price. How we got to where we are today, ongoing legal discussions, what to expect going forward…well, I think Troypoint is right on target in his post U.S. Lawmakers Push To Criminalize Streaming.