How to rate Google Play itself? I want to know how we can put review or rate google play store (not their apps)
From Play Store support


When you can write a review

You can only review apps you’ve downloaded.



Since you didn't download Google Play, you can't review it. Instead, from the Play Store → Help &amp; Feedback → Send feedback at bottom (via mail) is an option.

Edit: Just found this, it is a better option. Raise it in the Google Play help community