And who exactly are you to tell him to "shut up about it"? He made his case. You might disagree. State your case and let the discussion continue. Anything else --like telling him to "shup up"-- should be beneath HN standards.
For one, people do use alternative products. It's not as if Chrome is the ultimate browser. It's not like Android is the ultimate phone OS. The only real Google stronghold is search. Even there, Bing has come a long way, lots of geeks prefer DuckDuckGo, and 1.3 Billion Chinese could not care less about Google Search for example. More than that, people would be really happy to see a real contender in the search space in the West too.
And, more importantly, one market leading service does not justify taking abuse from the company that offers it -- or putting up with their other mediocre offerings.
Actually, come to think of it, nothing justifies taking abuse from any company or putting up with BS schemes they make. Even if they are the only ones selling water in Sahara.