Earlier quoted context omitted.
I think the review is meant to reflect the entire product, not just the app. That includes robinhood's service, they're not separate. And robinhood passed a lot of people off by restricting the buying of certain stock. The backlash is warranted
Sadly for me a lot of the apps I've made I'm pretty happy with are filled with reviews that basically say "Sally in customer service was mean, 1 star".
That they don't shouldn't preclude customers from rating the entire experience.