I'm really hoping your data rate isn't really 52k ... that wouldn't even get you the lowest quality stream nowadays.
I'll be the first to concede that Netflix are totally awesome with their player experience, and we can't get anywhere near the standard they set - they write all their own code right down at the lowest level to get the best possible experience out of the hardware. We don't have the skills or resource to do that.
What I can say though, is that buffering of BT Sport on Android TV should normally be pretty good - the stats this end show a very good average across all devices.
Could you DM me with the BT ID you're logged into the app with, and I'll check the stats for your specific device and broadband. One thing we do see on occasion is that a high error rate on a line can trick the player into offering a higher quality than it can realistically cope with.
