Google is certainly not a corporation that has ever shown to have an interest in the best for their users. They have already done quite a few things that benefit them or hurt competitors (youtube's UI is slow on firefox, changing the scrolling UI for no reason, trying to kill adblockers and now blocking uBlock from their store).
Google is no different than any other for profit corporation. Their first interest is making money by getting their customers to pay them. Their customers are advertisers. Their users are what they sell to their customers.
And that’s fine. But anytime HN users start whining “monopoly” the next thing they start screaming is for government to intervene every time that Google/Apple/Amazon doesn’t something that they don’t like.
How many times have HN users posted that Apple is a “monopoly”?