Do you not understand that a search engine is not a business by itself? I'm struggling to understand why so many supposedly smart people don't seem to grasp the obvious fact that Google can only exist in the current form or not at all and that any viable business of the same form has to look the same. Chrome is not a self standing viable business. YouTube is definitely not one either. Ads only works because the search engine exists. The search engine without ads would be a money pit. It's a synergistic business.
This argument can be made about nearly any anticompetitive monopoly, and that should not stop the government from deciding that, if the business can only exist in its current form, then the business should not exist.
You're not entitled to a business model if your business model is harmful.
What evidence do you have that their business model is harmful? As a consumer search seems like an extremely healthy sector right now with plenty of competition. Google just happens to be by far the best.
What exactly do you think is stopping you from using a competitor? Can you not find the setting to change your default search engine in Chrome? Is Google blocking you from making that choice somehow? All the arguments I've seen for Google being anti-competitive in this sector are extremely weak.