Nevertheless, that is besides the point as the rendering engine is not the sole source of browser differences. I am not saying the Googles high market share isn't a problem itself, but that Apple is abusing their market position to hold back the development of the web (by not implementing relevant APIs and not allowing competing browser engines on their platform).
In my neck of the woods people most definitely do complain about Chrome, specifically the lack of privacy from being a Google product.
It’s a bit ironic, but browser engine monopoly on iOS is the only thing standing in the way of browser engine monopoly across all platforms.
The conversation is 100% about how much influence Apple should permit Google to have over the evolution of iOS.
I don't know why Apple is allowed to keep other browser engines out of their system, but probably just because the relevant people just don't understand that the Chrome/FF/etc. on iOS are just a Safari with a different UI and that it gives Apple about half (depending on country; in the US probably more) of the mobile browser share and users just the chance to either use Android or be stuck with Safari.
In addition, the author obviously doesn't know that the before mentioned push notification API is not just used for regular push notifications, but is also required for other use-cases like messengers for example.