Yeah, I have a similar story WRT McDonalds. When we first moved to our present town, we were amazed that burgers from the local McDonalds actually looked like the burgers on the commercial, not the smashed bits of hell we've always seen from other McDonalds.
This was a few years after McDonalds was taking a serious beating to their reputation for poor quality and nutrition, and were really making a public push to improve ingredients, quality, and overall menu health. So, we just assumed, "hey, McDonalds must be finally cleaning up their act." Some of the burgers actually went beyond just "not terrible", to "pretty good".
But over the years since then, as we've hit various other McDonalds restaurants in our travels, we've come to realize no... McDonalds is still terrible. It's just "our" McDonalds that's an anomaly, it must be the local franchise owner/manager.
So, yeah... I'll believe you that your Pizza Hut is much better than the one in my home town. They became so much of a joke there, and really in our entire surrounding area, that most of them have closed and gone away.