Back when iOS 6 was released with Apple Maps and no YouTube, Google could be forgiven for problems with their replacement apps, as Apple had somewhat surprised them with the timing of the removals. That was three years ago, though. In the present tense, it's hard to imagine what you mean; it's not like iOS has some library to inject crashes into Google apps, or Apple is preventing updates to those apps from being published on the store (as ruled out by the frequency of updates).

There's the fact that iOS currently doesn't allow replacing the system hooks for Maps and Safari with Google Maps and Chrome (or any other store apps), but that's not the type of problem the parent was complaining about.