Would you be able to explain a bit more what you are seeing? Is the queue that you have just showing up on the "queues" page, or do you have extensions enabled to monitor rabbitMQ / MSMQ? If there are too many queues being detected, you could try to filter down to a single queue name in data explorer and see if that gets results.
There was a response time degradation and the root cause of that was [placeholder queue (too many queues)]. Now we want to know the names of those queues from high to low. How?
The data explorer split will also show the name [placeholder queue (too many queues)] only.