Samsung 49" Q6F Special Edition QLED TV

My Samsung TV is horrible. Wish I had not purchased it. Buy another brand.

it’s a $100 more directly from the Samsung website for Brand New- At least that way you’ll get a full warranty and customer support from Samsung
https://www.samsung.com/us/televisions-home-theater/tvs/qled-tvs/49--class-q6f-qled-4k-tv-qn49q6famfxza/

Check the source, quality level of cables and if your are streaming, check the level of service ( bandwidth & bandwidth utilization)

Unlikely its your TV