I spent two weeks delivering for Uber Eats and made $4.40 per hour

Sounds like a raw deal for a bicycle, but, how about on a scooter?

The main issue is that they don't have enough customers but they still pull out as many people as they can to work for almost free

I see your point. In Sweden, I see they don't have a minimum wage, and that they use collective bargaining to make agreements. Since Uber Eats is new, I imagine they haven't established a union yet.

I wonder how that will play out.

If you join a union you'll get kicked out is how that will work I imagine.

Firing someone for joining a union is against the law. In fact firing an employee after a grace period is difficult in Scandinavia unless they are clearly incompetent or criminal.

For that reason it might even be that Uber doesn't worry too much about high turnover because it means that most of their workers are sackable without having to give reasons or compensation.