Would they ever apply the same scrutiny towards their own apps? Can you imagine Google maps being taken off the play store without being given a reason?
I filed a support issue in the play store complaining about being unable to install the app.
But quite frankly this should be a case for antitrust.
On top of this, the Play Store is just one of the few stores you can have on Android. Organic Maps itself can be installed via F-Droid, Huawei's store, Aptoide, etc, not to mention that you can download the apk from their site/Github and install it.
I'd agree with you if this was about Google Search or something like that, but Android apps? I don't see any monopoly there.