"Most people who complain about how terrible the organisers/performers/floor singers/audience are tend to scuttle back under their stones when you suggest they try and organise something themselves."

True, but it would be nice if the more constructive complainers had the opportunity to get their "foot in the door" and make suggestions and change within the organisation. Unfortunately, most clubs and organisations tend to be resistant to change. So, newcomers to committees etc often face an uphill struggle and either tend to give up and quit or, alternatively, conform and go with the flow.
So, nothing much really changes..sadly, I know from experience.

Setting up in competition is not always practical especially in a smaller town or where there already a surfeit of clubs and sessions. You really need to have a few good original ideas and lots of motivation. Not everyone can do this but their opinions should still be considered by existing organisations as long as they are presented tactfully and constructively