I don't think you're their customer anyway.
We eat out a lot, all independent restaurants on our local road. We probably eat out an average of 2-4 times a week for brunch, lunch or dinner. Sometimes we'll go a week without eating out but then others we'll have lots of stuff on, friends/family visiting etc. Generally all produce served in all of then is local too; all meat from the local butchers, veg from the local grocers etc. We spend a fair amount at our local restaurant and as such you get to know the staff, get invited to special events, generally 'sorted out' etc.
Wetherspoons is a hole. We go there at work very rarely just for drinks and yes, that's 'fine', but the food... if you think it's "effectively the same quality" then I dread to think where else you're eating as well.
But really, it's the likes of Wetherspoons that's damaging better independents. The owner is an idiot, they treat their staff like rubbish, they let beautiful buildings fall into disrepair, and cut corners wherever possible. I mean they don't even play music so they don't have to pay the PRS. What corners do you think they're cutting in the kitchen? Can't stand the place.