Unfortunately, that is the downside. I watch on an OLED and have the same issues. The individual apps do generally have a higher bitrate stream and look better, but they will be about 20-30 seconds behind the the YouTube TV stream (with broadcast delay enabled) if you care about that. Some careful adjusting of your low res content/clarity settings in your TV’s picture menu can help here as well. I would start here. The 4K package for YTTV does offer some channels in 4K and it does look way better. ESPN 4K is the worst (and if you use an Apple TV you won’t get a 4K feed due to the codec they use), but it still looks WAY better than the standard shitty feed. Fox games on their 4K channel look outstanding. You can actually get the 4K feed for those thru the Fox Sports app without paying for any additional package as well, if you want to try it for a game and see how you like it (there should be at least one Fox CFB game every week that they will have in 4K).