The problem arises when a company leverages a monopoly to suppress competition, implement predatory pricing, or manipulate competition in another market. Using a monopoly in search to compel tying agreements prohibiting browsers or manufacturers from including other search engines or apps would qualify. If it turns out that agents of the company (Directors, VPs, etc) internally communicated an intent to suppress competition that would be more than enough to bury them.
By that same argument, companies that aren't huge can't compete with Walmart, UPS, McDonald's, etc.
That argument basically breaks down to "Small companies can't compete against huge companies without finding a way to become huge themselves."
Isn't that just capitalism?
I think you may have replied to the wrong post, because your post doesn't make a lot of sense as a reply to the parent.