I think there are many good reasons to pursue anti-trust action against companies that are in a dominant market position, but we should be honest about the tradeoffs. Businesses that have to aggressively compete to maintain market share don't have the slack to fund basic research.
Had Google operated like a normal company, the risk/reward of this kind of research would've looked completely differently.
Google's monopoly helped research along in the same way totalitarian countries like China are developing infrastructure at break-neck speed: if you don't need to care about pesky rights and regulations, you can do things that would otherwise be impossible.
I don't think Google's monopoly is worth having the current generation of lie generator bots around, but I don't think generative AI would be where it is right now had Google been forced to comply with antitrust regulations ten years ago.
I'd argue the fact that Google publishes much more of their research than their competitors do is a strong indicator that they're actually not the anti-competitive ones.
Google's entire business model is currently under threat right now.
The software world was basically created by Xerox and AT&T research.