

It looks grainy because it’s a damn TV and not a monitor. You’re not going to be able to tell the difference AT THE DISTANCE that you’re supposed to be using them at. Larger monitors are meant to be used from a farther distance away. TVs are meant to be used from across the room.
You’re that guy with his retina plastered on the glass of his smartphone going “I CAN SEE THE PIXELS!”
TV panels have lower PPI than monitors.