I have checked on my TV where the picture is perfect so please VM clean up the picture on TV GO. my screen shot failed so am unable to include an example but the colour is all wrong and there is a lot of shadows on BT Sport 2
Really sorry you're not getting the best picture on TV GO, this isn't good.
We can certainly feed it back but it would be great to provide a picture so we can see the exact issue.
If you have a chance to do this please reply and we'll take it from there.