That sounds like you need a better antenna. My choice was the biggest without looking like a ham gear person.
Hi, I've had a Samsung Smart TV (32', not sure what model) for approx a year now and have had no issues with it.
However, as of last week, I have had problems with the reception of all channels on the Smart TV, solely. The sound is fine, but I'd liken the picture to that you'd expect on a day of heavy rain, distorted images etc.
This is a new issue and I've tried to retune the channels, play with the terrestrial & satellite settings on the TV, but to no avail.
I have a BT box as well (for over a year) and the picture on that continues to be fine. It's just the digital channels that come with the TV that have recently become an issue. Does anyone have any solutions?