Uh... which of Uber's actions here are unethical?

Aggressively poaching drivers from Lyft seems all right to me. That's just healthy competition.

And this stuff about wasting Lyft's money by booking and canceling rides -- it's a bunch of nonsense. By Lyft's own estimate, Uber employees booked and canceled 5000 rides since last October. That's like $100k/yr in lost revenue. It's nothing. Certainly not a systematic attempt to undermine Lyft.

Am I missing something here?

Disclaimer: of the two services I only use Lyft. I've had bad experiences with Uber's customer service.