i was educated in a different country, whose education system is ranked significntly higher than that of the UK by various bodies, and on attainment data (i.e. PISA scores)
i teach here in England.
fwiw, i find the A level exams in my subject comparable in terms of difficulty and challenge to the ones i took. my home country emphasised slightly different aspects of the subject (i.e. if it were maths i were discussing, my home country might have spent more time on algebra and less on calculus, with the inverse true in the uk. my subject isn't maths though!).
i first studied my subject at this level 20 years ago.
while many people seem convinced that 20 years ago pupils could recite hamlet from memory and calculate pi to 6542396989690834 digits in 0.00004 seconds in their heads while juggling flaming knives, whereas today's pupils can't stop drooling long enough to answer an exam question worth 80% of the marks about how many letters are in their own name, i must say, it doesn't really reflect my day-to-day working reality