It is free choice, you can always delete the app and stop doing this and go off and do something else. This isn’t a set of chains, it is up to you to decide to sell your services. If you let yourself go for cheap, it is on you.
bttt...
That’s the way I’m seeing it, “gig” or no. Don’t like it cuz your employer screwed ya? Go find another employer; there are more of those delivery services out there.