Should I get new tires?

Yes, I have been awful about tire rotation. As in 26,000 and I haven’t had it done. Yes, I know it’s bad, so please don’t chide me about it! Thanks. :-)

I went to a national chain to get an oil change and tire rotation. They would not rotate my tires because the treadwear was too uneven. (I heard the numbers 3mm and 8mm but was too annoyed that they couldn’t do it to pay attention to what those numbers meant. I also think they said that the difference was from side to side, not front and back.) The man there told me that they used to be able do this, but have been since forbidden. He also said that a mom & pop shop might do it.

Should I suck it up, get new tires and swear to be better about rotation? Should I take the car to the mom & pop place to see if they will do it? These are the original tires and I think they’re only rated for 30,000 miles. About 90% of my driving is on the highway, if that matters.