I was watching monday night football I go make food and come back and this is how the screen looks
Try unplugging the power for a while. If that doesn't help, I hate to say it, but I think your TV is toast. If it's still under warranty, contact the manufacturer. You can try a factory reset or recovery mode, but I'd be surprised if either helps.
How do I factory reset my Roku® streaming device? | Official Roku Support
How to use Recovery Mode on your Roku TV™ | Official Roku Support
Where can I get support for my Roku TV™? | Official Roku Support
Sounds frustrating! Watching football with a screen acting up can really ruin the experience. Hopefully, it’s just a minor issue with the settings or cables. By the way, prepping food during the game is always a win—nothing like enjoying a great menu of snacks while cheering for your team!