The only thing worse than Papa Johns is probably Chuck E Cheese birthday party pizza. It's that bad. The scary thing is that in certain areas of the country Papa Johns is considered the only option besides a slice at the gas station.
I grew up in one of those areas. It's amazing what you think is good when you've never had good. I used to love Pizza Hut because it was the only thing around besides frozen pizza at the grocery store, and when I was a kid, frozen pizza was nowhere near as good as it is today. And that's saying something.
Even though I don't live in a big city now, I'm close enough and thankfully there are a few Mom and Pop Italian restaurants around that have a pretty good slice. It isn't a NY slice, but it's certainly better than Domino's. I haven't had Chucky Cheese since I was a kid. I can't remember it, but I'm sure it was bad.
I remember when Pizza Hut first started having an afternoon all-you-can-eat buffet back when I was a kid. The pizza buffet was this new, fancy idea and all the fat slobs came out of the woodwork and hovered over the buffet line. It was so disgusting. It seemed like they baked a bunch of cheese pizzas and threw whatever toppings they had laying around on it. It was like the gluttony scenes from Seven. You could smell the diabeetus. Ugh.