Cannot comment on gig companies dying out but this company is so overrated.
I would most definitely not want Doordash to die a quick death and I'm sad that you do! If not for their existence it would probably be too much trouble to do the research about restaurants in our area that are open, what their food is, how to order, then place the order via whatever novel phone or buggy online ordering system they've set up. We'd probably just end up ordering Domino's every week instead of what we do now which would be worse for everyone!
The desktop web interface is slow enough to be irritating but not so slow it's unusable.
Finding open restaurants with Google Maps is pretty easy. They have a specific option for "is currently open", and menus are frequently linked right from the business's listing.
Strongly agreed that these gig companies, at least in their current form, can die as quick a death as possible.