I haven't eaten at a Subway in about twelve years! The nearest Subway to me now would cost about $15 in gas just to go there and return. That makes for an awfully expensive sandwich.
When I did live near them and eat, I preferred either the roast beast or the tuna.
I went into one Subway and ordered a tuna sandwich. The employee couldn't find a scoop to put the tuna on the sandwich so he grabbed one out of the sink and used it without washing it. Once he had the sandwich made, I told him to throw it away and make me a roast beast sandwich. He didn't understand why I wouldn't eat a tuna sandwich when the tuna had been scooped onto the sandwich with a dirty utensil.
At another Subway, they had these two girls running the place on Friday and Saturday nights. Those two girls were two of the filthiest people I have ever met. They would only clean off the counter surface where they fixed the sandwiches at closing time. And they spilled a lot of things. The result was that a couple of hours into their shift, the counter area where they fixed the sandwiches would be an inch deep in things like lettuce and meats that they spilled from previous sandwiches. It was truly disgusting. On several occasions before I learned to identify them, I walked in, waited in line, got up to the counter, looked at it, and then turned around and left.