There’s nuance here. If it’s ‘bad’ as in like the meat is still raw, or there’s a lump of the chef’s hair wadded up in it, then yeah it’s refund time.

If it’s ‘bad’ as in they made it properly but you didn’t like it, just suck it up and don’t order it next time. It’s good to try new things, but you can’t expect all of them to be a banger. The number of people I’ve seen punish the restaurant for giving them exactly what they asked for is kinda bonkers.