Maybe your brain is having a difficult time processing the information you're getting from the TV which is why the same thing happens when you fill out paperwork.

Are you trying to watch really slow TV shows that seemed boring to you before the injury?

When I started watching TV I could only watch really light and fluffy shows on HGTV.

I can't watch a lot of TV without overstimulating my brain either. But I don't think I miss TV as much as you do, or maybe I'd be more upset about it.

I've taken up a sewing project to keep me occupied. And I do crossword puzzles. And I practice simple math. Maybe you could try one of those things to try to eradicate the boredom?