Similar experience. While the django rest framework is a joy to use, I’m almost inclined to call graphene a headache. Poor docs, lots of spread our third party extensions that really should be in the core... I have even found myself wondering if the stark discrepancy between drf and graphene reflects or hints at a decline of django as a framework.
I don't know about decline but in the UK there are currently 65% more Django roles than Rails on Indeed.co.uk if you search by title:Django or Django title:Python.