The only place abroad I've preferred to home that I've been to(3 times) was Cape Town .
Too dangerous there nowadays so that's out.
Will probably look to do 6 mts in Portugal and 6 months at home when retired.
Dublin was another place I could live though maybe too expensive as retirement looms in a few years.
The grass is always greener....
Even the countries very popular with emigrants such as Spain have their own problems, which very often you don't realise because you're not bombarded with them in UK news every day. There are many who live in Spain in ignorance simply because they don't speak the language (or not to a high enough level to pick up the nuances). It doesn't mean problems like inequality, racial tensions etc don't exist and some, such as employment/opportunity are a great deal worse than UK.
Spain has things right, but just as many that are worse than UK. Their taxation/inheritance regime (for those not in the "rich enough to hire tax accountants/lawyers" bracket) is significantly worse than UK for accumulation of family/generational wealth to name just one example.
Whilst I can't deny that the UK has got signficiantly worse over the years, particularly politics and standards, it's a fool who believes that hasn't happened everywhere to more or less extent.
back to 1983 please
Don’t know about moving abroad but I’d take going back to 2014…
We live in San Diego (U.S.) where the climate is near perfect. We love our life here, except for the very high cost of living. We were lucky to have bought our current house brand new in 1999. The value has grown 4x to 5x since then. The raging right-wing political forces here in the U.S. are cause for concern. BTW, I don't feel unsafe in the U.S. despite the mass shootings, which actually only directly affect <0.01% of the population.
If I were to pick another country in which to live, I think it would be New Zealand (Auckland?), though I've never been there (or to Oz).