Deliveroo, Uber Eats, Just Eat also (again, speaking for the UK) do not list restaurants' food safety/hygienic ratings, which is a requirement to run a restaurant in the UK[2]. This has lead to people like a comedian here (Joe Lycett) making a restaurant in a skip (a big industrial waste disposal unit) and getting food delivered to himself to see if it would work[3]...and it did.
If that wasn't bad enough, in London, Deliveroo actively masks restaurants' locations. For example, you order from "my 5 star restaurant" but the food might not actually come from the restaurant, instead it comes from a metal shipping container, under a bridge, next to a train track. These, are made by Deliveroo and, again, have no safety ratings/hygienic information.[4]
[1] (example) https://www.independent.co.uk/news/business/deliveroo-food-o...
[2] https://www.bbc.co.uk/news/uk-45888709
[3] https://twitter.com/joelycett/status/1085924299339452420?lan...
[4] https://www.theguardian.com/business/2017/oct/28/deliveroo-d...
This has been my experience, several times, it really isn't a unique experience. Their policy seems to be to cut corners and hold on to money as much as physically possible. Don't get me wrong, i love the idea, and convenience of it all and use all 3 apps pretty regularly. Given the amount of money they make they should all seriously step up their game in terms of just not being shady bastards.