I was talking about this just last night. Five Guys is absolutely the worst of the mid-priced hamburger chains, and even their fries are almost as bad as In-N-Out's, which is like making a car whose steering wheel flies off while you're driving.
In-n-out fries must be eaten while they're hot. In that state they are delicious. The precipitous decline in quality upon cooling occurs because they are made by frying potato pieces rather than by assembling various starches in a laboratory.
I think my tastebuds must be off because I feel the same way. There's always a huge line at Five Guys and people rave about it but whenever I eat there I feel like I need a straw for my fries because they're just drowning in grease.
I get that people like it and I'm certainly not going to discourage anyone from doing what they enjoy, but I also feel like social media has turned certain fast food chains into memes where you can't merely just be satisfied with something, you either need to looooovveeeee iiiitttt or demand it be "canceled". There's no middle ground.