There's also the issue of faulty menus on those delivery platforms. DeliveryHero for example appears to be using generic stock photos to illustrate the dishes, I presume based on keywords. The result is that your food very rarely looks like on the website.

Also, the support staff from those platforms obviously don't know how a dish is supposed to be, so they'll just apologize to the customer even if everything was correct.

In combination, the led to me one time accidentally report a dish as missing. I had ordered something called a "burger inspiration" and the picture on the website was a regular burger. But I received a soup instead. So I called to ask what happened. The support guy apologized, confirmed that it should have been a proper burger with bread and stuff, and offered to fix it. Later, another soup arrived. With a bit of research, I found a PDF of the restaurants in person menu and indeed the dish is supposed to be a soup. It's just that neither me nor DeliveryHero knew that...

I'm guessing there's little incentive for them to improve their online menu listings or to fix confusing images, because the restaurant, not them, will pay the price.