Waiting on hold, handling payment details over the phone, miscommunicating an order, language barriers (not everyone who runs a restaurant speaks the local language fluently, and not everyone living in a place speaks the local language fluently), not having to explain my address.

Then there's the benefits of online - menu is accessible, often they're using stripe/Shopify so my payment info isn't everywhere, it's one click, I get email confirmations and receipts, I can leave free form notes easily, and last but not least, I don't have to talk to a person who may or may not want to talk to me.