
I must just be the luckiest man on Earth when it comes to DoorDash. The only time my order was messed up either the driver or the store immediately sent a report in to send another dasher to get my side items (thank you Nijiya) missing from my teriyaki beef meal.
Meanwhile, my roommate has had to just go pick up his food from a place not 10 minutes from us because the dasher apparently couldn't make up his mind if he wanted to make the delivery or not, a friend who lives in Fort Worth had a very similar situation to you where he never got the chips from a Mexican restaurant he was specifically excited for and they kept telling him if he didn't have an account (guest checkout from DoorDash I guess) they couldn't do anything and the list goes on.
Worst I've ever experienced is an order arriving later than listed.