Sure, it's my opinion, and I've been to something like six BBQ places in Atlanta. And I'd say four are pretty good, two were disappointing, the time I visited (only went once).
I don't claim to be any expert on BBQ or have any discerning palette either. The last time I was at Fox Bros. I was frankly disappointed, but I ordered rubs, which I had never ordered before. They were mediocre, IMHO. They also have changed their fried okra which went from really good to meh.
One place I found disappointing makes the usual on line "best of" lists. Maybe I went at a bad time. Or ordered the wrong thing. Fat Matt's Rib Shack, near us. Maybe I should go back, it's packed most of the time.
I know there is variability in the restaurants we go to fairly often, sometimes they are great, sometimes a bit disappointing, on occasion they let me down, if it had been my first visit I'd probably not return.
One place we used to go to fairly often, a tapas place, good food, nice patio, OK to food service, and then suddenly the service dropped off. We went back a couple months later and the service was bad. We went back 8 or so months later and the service was bad. We haven't been back, food is still good.
I know enough owners and managers to know they still struggle to get good servers. The pricier places can attract the better ones, usually. I get used to top tier service at those places.