It's some sort of delusion on this website that Google is falling behind. Or more likely, wishful thinking.
Kinda the point of preventing monopolies. They stagnate actual growth in the pursuit of profits. Americans don't benefit when Google is a trillion dollar company, but Americans would benefit if there was an actual competitive market.
I don't know anything about Quantum so I'll defer to you on that one.
In the LLMs/inference/ML space they seem to be great at theory and poor at execution until someone else shows them what the model looks like first. Similar to with cloud. Or with mobile. Or with voice assistants. Or with social (well, they never got there on that one even with the copy attempt.) Which is a classic "decline phase" behavior (see also Xerox, Bell).
If all Google products outside of their research papers and labs had disappeared ten years ago, what product categories would be missing?
But it's also over 20 years old.