The big problem is Chromes and Googles dominance over the internet. Even at this moment, there are sites that don’t work with Firefox/alternate browsers at all.
Stating that people can use alternative browsers is theoretically correct, but in reality one is forced to have a Chromium based browser installed for the websites/services one has to access. (My main browser is Firefox and I have a Chromium backup browser on every device, not by my choice.)
Combine this with the push of Google to prevent adblocking and centralize control of the internet at one place, and we are on our way to a real shit show.
You can happily search for the history of Internet Explorer in the 2000s, for a taste of what is yet to come.
In case Googles agenda has not affected you, yet, you should really ponder if
a.) Googles agenda will never affect you negatively in the future b.) Googles agenda will never affect people you care about in the future
In the end, I don’t hate Chrome, Chromium or any other browser based on this technology. I really don’t like the direction things are developing and I remember the monopolies of the past in IT, which were only of benefit for the monopolists.