I drove for doordash about ~2 years ago. Everyone knew the ratings had no say in your orders. You could see all the threads and Reddit posts of new drivers asking, and nothing but replies along the lines of the only metric that matters is failed deliveries. Fail to complete too many (IIRC it was something like you needed 80% success), then you essentially get fired in the form of you won't receive any more orders.
To be fair, that might have changed since, but IMO those platforms are fragmented and they need all the drivers they can exploit. So unless a driver fails too many times, what do they care? From personal experience though, it can easily be the customers fault and they get pissy and leave a bad review, which makes ratings that much more irrelevant.
Example/old rant: Had a guy order a single Popeyes sandwich, with like $1 tip. I took it because it SHOULD have only been like 7 mins total, as I was right there, for a quick ~$5. They gave 0 instructions for what must have been an apartment complex designed by a mouth breather who failed Elementary School. 1/2 the buildings where numbered/lettered the same. They didn't use any kind of order for building nor door numbering, and on top of that the entrances were under construction. So every door had its number missing except for a little piece of painters tape with a sharpied number on it. After 10 minutes of looking for his apartment, and 0 response from the customer, I left it at a random apartment whose number matched and took the photo, and left a comment it was impossible to find their apartment. Of course within minutes of completing the order they start blowing up my phone, to which I just finally blocked their number.