Bad pizza to me is when the dough is old, I worked in pizza in my years before the military, some places will use day old to save money and it is awful, I love Simple Simons pizza, nothing fancy but its good, last one I got the dough had to be day old and the yeast died or didn't do its job to begin with and it was so bad I couldn't eat it.
My dream has always been to own and operate a pizza joint, not a big one, just a modest place that puts out an exceptional product that keeps folks coming back.
Here in Cleveland I look from time to time and if you time it just right there are pick up and delivery pizza joints that go up for sale and are not as expensive to purchase as you might think. Usually the owners want out pretty quick. Now obviously your left negotiating the lease on the space and have to put some money on the line as far as that goes and that's usually where it starts getting scary.
There is a place that I go to and the owner told me he doesn't spend a whole lot of money on fluff like having a bar and waitresses and all that other stuff, he said he likes to take the money the pizza shop makes and put it back into the food and it's worked very well for them, there pizza is probably in my opinion the best in town here in Cleveland and I actually think they are a customer of Sysco Cleveland, to boot, but there product is always fresh never doughey cooked to perfection.
When pizza dough gets old at least where I worked, it got hard and crusty and would not want to conform very well to any pan or anything and would rip or tear and it would cook okay, but it would brown kind of weird and the dough wouldn't want to rise like it should.
Really the place I worked at had a lot of other stuff on the menu and while pizza was the core product as time went on the sandwiches, pasta , salad and all the other items ended up really taking over.
If I were to have a pizza shop I would pretty much want a small pick up and delivery only place, and I would have a salad table, a make table, a fryer maybe a grill and a rotator pizza oven like a Bolling pizza pro. All the really good places here in Cleveland have Bolling pizza pro's. They give the pizza a really nice bake and as long as the pizza isn't in the oven to long it comes out all nice and crisp, but not over done.