Expats

They were happy to leave, why don't they shut up and get on with what's happening in their adopted country!

Are you expecting polite replies to this rather rude comment?
Do you never comment on any other country's government? If you've never commented for example on Trump's administration then that will put you in a tiny minority. Or is it just their own country they must not comment on?

It's an interesting question, I've pondered it often. I assume you mean in a critical way here, Riversidegirl.
1. Because they want to feel justified in their choice to live elsewhere, so they dumb their own country down?
2. Maybe because they aren't really happy and would return at the drop of a hat?
3. Maybe because they feel qualified to still comment on the British way of life because they have strong connections with the UK?
4. Maybe because they are right, though personally I think nowhere is perfect, just different.
Who knows?

I'm an expat and I see no reason why I shouldn't comment on affairs in the UK particularly as I am a lifelong and continuing UK Taxpayer.
Even if I weren't a UK taxpayer I think that my previous lifelong residence in the UK and information from friends who are current UK residents qualifies me to comment in a reasonably informed way.
I am interested in political affairs worldwide including in the UK and in France where currently I live.
Finally what happens in the UK is affected by affairs and events in Europe and America and India and Australia to name just a few.
cf Allira's
"Because no man is an island perhaps?"

Maybe for the same reasons U.K. residents feel it’s ok to comment on politics and politicians around the world 🤷‍♀️

Why is it that people in this country feel they need to comment publicly on other countries' ways of life, governments etc?

🤔

Because no man is an island perhaps?