Using someone at present who seems a little better, far fewer glitches but will take another months trial to observe. And yes, the plan is to switch to one of the Formuler boxes in the near future.To be fair you are correct in what you say, there are loads of resellers on here selling the same old rubbish. However, the Smart TV app could be your problem.
The supplier i use now told me not to use my Smart TV as it's just not powerful enough, I ignored him and the service on the TV was awful. I switched to a FireStick and it was spot on. So it could just be that. Same supplier, different device.
On the other hand, I have used plenty of suppliers and had bad service using every device you can think of, it's one of those things, you have to keep on searching.
As I said earlier though, I only use it for sport, if you are using IPTV for all of your TV viewing then you are going to get annoyed with it.