Fast food is usually only palatable hot. By the time it gets delivered it’s cold, no? Also fast food is cheap and the delivery cost is a large percentage of the overall bill. I mean a $10 meal ends up being $20.
Justeat delivers from fast food.
Deliveroo costs more because it's providing a delivery service for restaurants that don't normally deliver.
So I'm getting good food. When in a restaurant, things sit in a kitchen for 10 minutes waiting for the rest of your order anyway. 10 minutes in a thermal bag is the same.
"To me this ruins the meal"
shrug, I'm not sure what you're expecting anybody to say. I can't really change your mind on what is hypothetical situation for you. I've ordered plenty, it's generally no worse than the quality I would get in the restaurant (other than the presentation in a bespoke takeaway box not a plate).
Also, what kind of presentation are you expecting for a burger anyway? It's a burger, with some artfully surrounding chips? Ordered to go, it's a burger, with the chips in smaller box instead of surrounding the burger.
But at that point you're basically just objecting to all delivery food ever. Which is fine but, like, you are aware that it is a huge industry and has been for decades and people do like it? Convenience trumps artistry (and optimum temperature) for many people a lot of the time.