You know what's worse for Google than "antagonizing" Apple?

Being at complete mercy of Apple.

Google has Android, which has a bigger market share than iOS. If Apple kicks out all Google's services from iOS, Google still has Android.

If Google didn't have Android and Apple kicked them out of iOS, they would have nothing.

This is a long term game for both players. Google's strategic plan is to advance Android. Apple's strategic plan is to advance iOS and don't be dependent of Google, which is why they are kicking out Google's maps and invest in their own solution, even though I'm certain it's way more costly for them to do it compared to licensing Google's service.

Both Google and Apple act perfectly reasonably given their long-term strategy.