In Louisville (KY) Google Fiber was handed every advantage they needed on a silver platter (One Touch Make Ready) versus the incumbents. Decided to "experiment" and did the absolute dumbest thing possible ("micro-trenching" in a state with an active climate and this thing called "Winter"), failed incredibly hard, and just shut down the network, cut and ran rather than live up to any promises they made to the city. (Leaving the bills for things like giant potholes to the City and its taxpayers.)
That wasn't incumbents fighting them. They did that to themselves.
Google couldn’t wire up their own back yard! You think Comcast has more lobbying clout in Silicon Valley than Google? Google rejected proposals from places like Baltimore and LA that were trying to kick out Comcast and asking Google to wire them up.