Exactly! People complain the UK is going down the pan, then complain when a government tries to change things which involve higher costs.
Scandinavia does have its issues, the cost of living is very high (housing, groceries and they have suffered with high inflation too) but as you say, the basic standard of living is SO much higher.
Scandinavia is predominantly a socialist region, which when gets pitched here, people draw similarities to Stalin and communism and kick back... it's a very selfish outlook.
The UK has spent years being divided by soundbites of misinformation, scaremongering and underfunding. If people stopped complaining about it and focussed on the good points, and invested time in themselves to grasp opportunity they'd find themselves in a much better position to make themselves happier and also make informed decisions about how to improve things.
We are still a strong partner with the EU in regards to trade, there is still decent opportunity for decent employment in the UK, we have some stunning parts of the world on our shores, and our access to anywhere else in the world is unprecedented I believe. Also, most countries speak our language ;)