That's a feature, not a bug. Otherwise the Senate would be bogged down with a bunch of idiots representing those who don't play well with others.
So the United States didn't play well with Great Britain, therefore they're a bunch of idiots?
It's a nasty mess to split a state, and I think it makes sense that it is a difficult procedure to make it happen. The revolutionaries who split the US off from the UK knew what they were doing, and they didn't make that decision lightly.
Part of it is a question of magnitude. If, say, Northern and Southern California
really decided that splitting was the better way to go, it would happen. But people would really, really, have to want it to happen.
But having a bunch of tiny counties trying to split off to form their own states is the point where it gets silly and expensive. After all, that sort of change requires a lot of bureaucracy and bureaucratic changes. States have agreements and contracts with one another. What happens if a state splits? Do those agreements stay? Which ones? What about the obligations? The debts? Treasuries could be split based on revenue, but what about debts that effect overall systems?
So, yes, having a bunch of counties splitting off and forming/reforming states all the time would be expensive and stupid. So I'd agree with the 'idiots' label, since I doubt most people who'd want such a thing would bother thinking about the ramifications. They'd just be angry that not everyone wanted to do things their way.