Its the franchising. Mcdonalds for all its faults keep a tight reign on things so it remains consistant. BK and subway you can see they do not or have very lax rules. There was one near my house awhile back where if the owners were working it you did not want to go in. Old wilted lettuce and such. Once in awhile they were gone and their kids were alone in the shop. I think the kids threw out anything they found gross. Working off the idea of what they would want for themselves. Then it was one of the best in the area. Unfortunately the kids being unsupervised was a rarity and so it could not actually get more traction from those good experiences as they were to few and far between. I actually have this problem now with a non chain gyro shop near me. The one we went to closed down but the new one I found gets to low of traffic and again. wilted lettuce and whatnot. Without more traffic you won’t get fresh stuff. If they were smart they would wait to cut the tomatoe and lettuce until someone ordered which would make a better experience and maybe more traffic and eventually they could do the ahead of time prep. As it stands now it will go out of business or be on kitchen nightmares.