R193 Due to my job, I end up eating fast food 3-4 times per month. If this is any help, here's my take on the topic:

Wendy's has slipped considerably. It's still possible to have a decent fast food meal there, if you choose carefully. Order a double burger or you'll end up with all bun and condiments, and little meat. Omit the sweetish pickles. Skip the newer style fries, introduced a few years ago; it's a shame because Wendy's old fries were very good. Have a baked potato or chili as a side. Baked potatoes are generally good if not cooked too far in advance and held in a warming tray. If the flesh has turned brown, send it back. Bland chili is much improved by a packet or two of the chili seasoning supplied upon request.

For better or worse, McDonald's is consistent. It hasn't changed much that I can tell.

Burger King is arguably the best of these three. Most of the regular menu items are passable to good. Onion rings, however, should go by some other name; they're ring-shaped hush puppies.

In all three cases, skip the seasonal/specialty sandwiches, unless you somehow happen to be a fan of the McRib.

Rally's has good burgers at reasonable prices, with unusual seasoned fries. (Apparently, the chain is called Checkers in other cities.) Unfortunately, the local store has only outdoor seating and, thus, is comfortable only a few days a year here. (I don't recommend any fast food for takeout. It's only tolerable when fresh and hot.)

I haven't been in Hardee's in over a decade. The food seems to vary drastically in quality from one outpost to another, perhaps due to management. I hear better things about their sister chain, Carl, Jr's.

I haven't been in Arby's in years, either, but there used to be a decent Chicken Cordon Bleu sandwich. It may still be available but not listed on the menu.

Finally, the worst local chain here is Steak n Shake with no edible choices except milk shakes, and few adults would choose to have a lunch or dinner of ice cream.