If council tax became voluntary you can bet things would turn around very quickly. There is no motivation for them to do anything useful because they get the cash either way.
If Council Tax became voluntary you're going to educate your own children and arrange your own rubbish collection and recycling contract? Under penalty of law for not doing those things.
For a business that gets shafted with doing pretty much everything, they do a decent job in most areas. Tesco and Amazon have got it fine - they just sell ****. Local Gove does a million and one things, most of it a required by legislation. Yet all anyone usually moans about is the bins, education and social services as they're the largest touch points.