Britain has had minimal economic growth for years. Poland has long been enjoying some of the highest economic growth in Europe. It even emerged from the pandemic better off than other European nations with, as Paweł Bukowski and Wojtek Paczos wrote for the LSE, “a relatively lax approach to economic lockdown and a bit of sheer luck”.
Institutions often seem to work better as well. I can generally visit a GP on the day I call. Britons often have to wait for more than a week. Maternal mortality is higher in the UK — and infant mortality is about the same, despite Britain being much richer overall. Actually, Polish life expectancy as whole is just a touch shorter than British life expectancy, despite the nation having a lot more smokers.
Polish kids have ranked higher on the PISA education rankings than British kids — ranking, indeed, the third highest in Europe in science and maths, and the fourth in reading comprehension. Poland is a more peaceful place than Britain, with murder and rape generally being rarer (granted, statistics in the latter case are famously difficult to trust). Terrorism, for reasons I leave to the reader, has been almost non-existent in Polish society.