Don't get me wrong, I love Django and think its a great framework for writing internal tools like this. Redis gets a pass too since Django has native support for it in 4.0+. It's really the (IMHO unnecessary) combo of MySQL+RabbitMQ+Celery that turns me off.

Redis itself has had solid support for building reliable distributed task streaming for nearly 4 years (Redis ConsumerGroups introduced in 2018).