

It’s a few things, but a big one is the framerate jumping around (inconsistent frame time). A consistent 30fps feels better than 30, 50, 30, 60, 45, etc. Many games will have a frame cap feature, which is helpful here. Cap the game off at whatever you can consistently hit in the game that your monitor can display. If you have a 60hz monitor, start with the cap at 60.
Also, many games add motion blur, AI generated frames, TAA, and other things that really just fuck up everything. You can normally turn those off, but you have to know to go do it.
If you are on console, good fucking luck. Developers rarely include such options on console releases.
My suggestion: Raspberry Pi (or any other computer) connected via an HDMI port. Use any photo program of your choosing. Many, many available for linux.
Fucking around with TV OSes is a PITA and is best to just be avoided.