That is not what is happening. I use Android, Chrome, and Google Search because the alternatives are quite poor. All of those things work better with alternatives than any competition. Android is the most open mobile OS, Chrome is the most open and non-coercive browser, Google Search works great with all other OS's and browsers.
It doesn't matter why you use any of this software. What matters is what it does to the ads market. This is not 1999 and this is not Microsoft. Google's product isn't software. It's the attention of its users.
Google's share of my attention is negligible to the point of barely existing when compared to HN, X, YouTube(yes I know, but I see no adds because I have premium), podcasts, audiobooks and many other things. Even Facebook probably takes more attention and I barely use it.
Google measures its share of your attention different than you do. You seem to think this is "attention paid to Google ads" but it's "attention paid to Google platforms," which correlates to their ability to target an ad directly to you. You see Google ads in many places around the web (even if you have an ad blocker), and their ability to serve you a good ad depends on how much attention you give to Google platforms, not just to Google's obvious ads. Google ads are 30% of ads on the web, not including the ads on its own platforms (search and youtube).
Isn't "monopolies suppress competition" one of the classic reasons people think they should be broken up? I'm not saying you have to agree with that theory, but just observing a current lack of competition doesn't by itself seem like an argument against breakup.
Google is not suppressing competition. There are plenty of competing browsers and search engines, they all suck. On the Mobile OS side there is less but substantially more robust competition, even though I, personally, hate iOS. So breaking Google up because of a theoretical problem that is refuted by reality is nonsensible.
> There are plenty of competing browsers and search engines, they all suck.
Maybe our difference in viewpoint is that I see this fact and wonder why it's seemingly impossible for anyone to build a financially viable alternative, and I'm at least open to the idea that it's very difficult to compete with Google when they can leverage their successful ads business to subsidize the investment into their browser.
Yes the alternatives are worse, but is that because Google is inherently smarter, or because the newcomers have a tiny fraction of the investment and usually fizzle out within a year or two? Google doesn't have to be actively trying to kill the competitors for it to have an anti-competitive effect in the market.
Also because Googles is part of the web committe because of Chrome, so it gets to dictate how much complexity is in a browser and stiffle competition like that.