We were able to force (a little bit of) change here in Canada. We had an oligopoly (backed by the government) a few years ago that enforced a 60 GB bandwidth cap on most of their plans. This was at the time when Netflix and other streaming services were gaining steam. I was usually past my allotment of bandwidth by the midpoint of every month. It was also on the heels of the recession. As people had less money, they started to look at cutting the cord for TV (average telecom bills were well over $150/month). People started to complain when they realized they couldn't watch Netflix on their shitty internet. The CRTC (our FCC) eventually caved and allowed for resellers to enter the market (true competitors are still not allowed in though).

These resellers quickly began to offer unlimited bandwidth at half the price of the incumbents. Suffice it to say, a sizable chunk of consumers made the switch. This forced the incumbents to scrap their own bandwidth caps (they used to argue that this was impossible due to technical limitations lol) and slash their prices (which they also vowed to never do because their "superior service" warranted a premium price).

We still have an oligopoly, but at least we're in a slightly better place now than we were 5 years ago.