The idea that people would rather pay unknown extra dollars to middlemen to avoid picking up a phone and talking to someone for 2 minutes is so bizarre to me.
The killer feature of Doordash is the fact that you can order in a structured textual form. The feature that kills it is their inability to provide a heat-preserving bag for drivers.
So yeah while I understand your issues, they simply don't explain this phenomenon when it comes to native speakers of English in the US.
I can call a pizza place and get a pizza delivered using the pizza restaurants' delivery person, or I can use a third party app and pay 100% more?