iOS maps is in the same position that AndroidOS was in a year or two after the iPhone appeared. Substandard in comparison, largely functional with big gaps, but an expectation of quick improvement.
Then they sell you and your data to advertisers.
I'd rather pay for something than be sold.
But you don't just rip out something millions of people depend upon for a function as critical as safe navigation in unfamiliar areas and replace it with something that has constant, pervasive issues performing its basic operations. A custom Maps application and dataset is a good business move, but you have to make sure it's at least a minimum viable product before you do the kind of rollout that Apple has done.
When Google replaces Gmail with the shinier "Googmail" and 25%+ of mail to the new service comes back undeliverable, and there's no reasonable method to revert to plain old Gmail, you'll have a comparable quagmire. The fact is that while Apple's Maps may occasionally work sort of well, the failure rates are unacceptably high; too high for anyone to trust the program any more.
It will take years to undo the damage from this, and I fully expect a good portion of people to swap iPhone for Android as a result.
How many did you pay for?