Seems like each person has her own triggers.....
I can still remember my seventh grade English teacher (who was sixty-ish when I was in junior high school, meaning her schooldays would have been circa WWI) talking about *her* English teacher having a passion about the pronunciation of genuine.......in other words, being deeply insistent that it must be pronounced GEN-you-win.
And as for people who pronounced it otherwise? They were pounced upon with a rhyme:
Gen-you-wine? Oh, you swine!
Talk about ear worms. That's been stuck in my head since the sixties. :)
--pig