For an example of bad competition, just look at streaming sites. We went from everything being on Netflix to everything being divided among dozens of shitty platforms, each of which costs more, and the prices keep going up, especially if you don’t want ads. Nothing was improved for the consumer when Netflix lost its defacto monopoly. Which isn’t to say that Netflix is great, only that the competition for marketshare has only made things worse for the consumer.

Not to sound like a ancap idiot or whatever, but I'd imagine that has to do with the fact that streaming services don't actually compete with one another. Exclusivity deals mean they don't actually compete in terms of user experience, features, ease of use, higher video or audio quality than their competition, improved bitrate, whatever. Instead, they just compete based on who can snap up what IPs for the cheapest, which is just a game of whoever has the most money, whoever can outbid their competitors. Then, you're not going to netflix or hulu or disney+ because of the features of the platform, you're going to them because they have some IP that the other platforms just straight up don't, and if you want to watch both IPs you gotta pay for both. So, it's not really competition, in the conventional sense.