It's funny for the taxi industry to be complaining of a monopoly, when they've spent decades with one. The whole medallion system was a monopoly. But, that aside, Uber is obviously not a monopoly, not when Lyft and others have existed alongside it for years.
The taxi industry is grasping at straws here. They were just way too slow to adapt, and they are paying for it.
It's a bit much to call a government-instituted program a "monopoly", dontchya think? It's not like the taxis could capitalize on their so-called "monopoly", since the prices were all regulated.
Taxis got screwed. Medallion owners got screwed. If you want to be mad, be mad at the government for letting Uber swoop in and take over.