Sure it is. There's competition, semi-regular speed upgrades, if I don't like my ISP I can take my business elsewhere. As a result, I'm currently on an entirely unlimited plan with no throttling, and no angry letter if I download more than some hidden limit. My understanding is that a significant amount, if not the majority of the US is unable to do that.
> the government thinks they can force-regulate things like a "porn filter" and content filters
They could do that in the USA already, monopoly regulation or no monopoly regulation. Monopoly regulation is practically entirely separate from content regulation.
In any case, they only regulate that the porn filter and content filters must be an option - I've certainly never had such a thing on my connection. The only sites that are blocked for me are blocked under court order. This is practically equivalent to regulating that ISPs must provide a free copy of Net Nanny to all customers to use if they so choose, it's just done on their end rather than mine. (Also, hilariously, there isn't actually any regulation on this - ISPs are currently doing it willingly.)