Best answer by Mathis
Sorry this new feature is not as satisfactory for you as we'd hoped. disabling comments is currently not something you can do on the iOS app (though I believe the Android app does have this option in the app settings).
For context: Comments on mobile were one of our most often requested features from our users, by far, for quite a while actually. Not only can you see the comments on tracks, you can also write your own comments, straight from within your SoundCloud app.
I will provide feedback to our product team for consideration.