Have you talked to an Uber driver who told you this? Jason Fried once commented about how he talked to his Uber drivers about the service, so I started doing it too. I have heard complaints, but I have never heard an Uber driver say that Uber was worse than the cab or car dispatch companies the driver worked at before. Not once.
I don't ever take UberX cars, though. Is that where the screwing is happening?
I always take UberX, I usually talk to the driver, and I almost never hear complaints. (The sole exception: when they lowered prices here in Boston). It's usually lots of praise.
I also often meet new drivers who are in love with the idea that they can work whenever they feel like it after their shift at the restaurant, or are retired, or somesuch. I don't know whether it's just a continuous stream of new drivers, but it seems like there's room for a world where all drivers are part-timers. It screws with the career drivers, but who are we to say that the part timers don't deserve that revenue?
I don't ever take UberX cars, though. Is that where the screwing is happening?