I smell the same anti-trust bullying that MSFT did in the 90s and early 00s.
They decided that they wanted a set of rules for when other people play with their toys. If Microsoft had followed the rules, instead of ignoring them, after saying they were going to follow the rules, it's their problem, not Google's.
No, they're not. https://en.wikipedia.org/wiki/United_States_antitrust_law
Yes, they can't literally do whatever they want, but in this instance, it's their code, their servers, their data (in a sense), they're permitted to define how others may use it, and use it in a separate way themselves.