The problem is that there's only really two ecosystems: Google and Apple. If there was more competition, maybe it would be fine if users opt-in to a closed ecosystem, but if there's only two options, there's a strong incentive from both parties to collude to prevent new competitors.

That said, I'm similar to you, I use GrapheneOS as well and have only owned the one Apple device (also iPod touch), and I largely avoid both ecosystems. However, going a third way definitely has significant repurcussions, as in I can't use many apps because they require Google's ecosystem to function.

It's not about if a company is shafting you then don't use them. If a company is shafting it's userbase, it shouldn't fall squarely on the customers to make a company stop shafting them, it's legislators and governments with teeth who should do something about it.

Try telling this argument to the team behind Netscape Navigator. Microsoft's most attractive aspect was using their Windows market share to, in their case, take market share in other submarkets like browsers and word processors. If the customers don't want to be behind such a dick move, they shouldn't use it? The government shouldn't do anything about it?

There are currently two ecosystems covering about 99% of the worlds phones. If you do not want to use either system you are locked out of what has become vital tech.

Opening up this would encourage innovation. It wouldnt be enough for airpods to work samlessly with iphone if they also worked seamlessly with android and "XOS". They would have to compete on price and featureset.

You’re being downvoted because everyone has stopped worrying about Netflix and now the zeitgeist is to hate Apple.