Google does not have a monopoly on search. Bing / DuckDuckGo works just fine.

Around 82% of search engine requests are issued through Google. Bing around 10%. I don't know if we just have differing definitions of "monopoly," but Google is the default on all Android devices, almost every non-Microsoft browser, and probably on Apple products as well. And most users don't know enough or care enough to ever change from that.