"Things don't improve without competition" sounds like a fairy tale somebody tells themselves to justify a position. People like nice things. They don't need competition to motive them to work towards those things. Granted competition usually speeds things up, but it "nothing improves without competition" clearly wrong. There are too many counter examples.
Which is just as well, because the things we are discussing here are prone to forming natural monopolies. Roads, water, the telephone service, electricity supply - the thing they have in common is you will have one supplier, and you can't change to a different one. There is no competition. So the discussion wasn't about "should there be competition or not", because there is no choice. The discussion was about "who should own a monopoly - people you elect, or people whose only primary interest is extracting money out of their assets (which happen to be you)". You seem arguing for private ownership, and then using competition as the justification - when there is no competition.
By the by, other places do this competition thing far better than the USA. The NBN the parent was complaining about is indeed a government owned monopoly. Their asset is "the last mile". The arrangement in Australia is they are a common carrier in the strictest meaning of the term. But they are not allowed to sell to the public, that's the ISP's job. The NBN's prices are thrashed out in some back room somewhere between the ISP's and the government, in front of a set of open books. The ISP's are allowed to use other technologies like 5G and Starlink without penality, by law. As an consequence every Australian household gets to chose between 100's of ISP's, literally. Those ISP's are require by law to advertise "minimum expected speeds", and none of this "unlimited (meaning we get to define the limit)" bullshit is allowed. In other words, it's nearly a perfect competitive market.
One effect of that is there is no "net neutrality" argument here. The NBN is barred from such distinctions because it's a common carrier. The ISP's are free to do whatever they damned well please, and as a consequence you get all sorts of deals that violate net neutrality. 5G with limited downloads, but unlimited streaming from some platform is free for example. If you don't like that, say because your ISP blocks ports move to one that doesn't. You might be thinking "ahh, but moving between ISP's would be hard". But no, the law mandates churning between ISP's is free, fast, involving no more than a few minutes downtime, and requires no interaction at all with the ISP you're moving from.
Creating near a perfect competitive market in an area that is prone to forming natural monopolies does require some heavy handed government intervention. The NBN was one of the most heavy handed interventions I've seen in a while. The private operators where given every chance to build a new network on the condition it be open to all retailers (including them) at a price the government had some control over. They declined. Partially because government price control on a monopoly was too much to bear, but I think also because they thought their ownership of the copper network was too big a hurdle for even the government to overcome. The government overbuilt it with fibre. In a country that's even more spread out than USA, that was a huge undertaking. I suspect it would be impossible in the USA, where 1/2 the population allows themselves to be brainwashed by large corporates into thinking "government always bad, government always inefficient".
Yes, the government is inefficient compared to private operators in a competitive market. But the corporates who want you to think the government always runs things badly are the ones who want to take control of government owned monopolies. If you want to know what inefficiency looks like, join one as an employee. You won't get to see what's happening otherwise. The sausage is ugly, but they unlike the government are allowed to hide it from prying eyes. So they do, and tell you they are doing a wonderful job. Apparently you swallow it up.
