As for McD's, they have 2 things that are really good - The Fish Sandwich and the Chicken Nuggets. Wendy's has good food, but the ones around me can never get the fries right. 99 times out of 100 they're soggy. (Not that I've eaten there 100 times).
The worst fries in my area are at Long John Silvers.
The worst, soggiest fries I've ever had is at White Castle (rest of the food as well as the service is pretty awful too, & they're almost always in bad neighborhoods). I think that chain is only in Ohio & Indiana.
Agreed on Wendys. It's been decades since I've been to a LJ Silvers, don't have any around here.
I've always thought McD's has the best fries of any fast food chain.