Oh, I believe you. But I still have people screw it up. And if they pronounce it correctly, they cannot spell it correctly.
Heck, Mississippians pronounce Kosciusko wrong to start with (BTW not my surname, but another Polish name).
I am sure. My wife’s family is first generation Polish. I stopped trying the tongue gymnastics a long time ago. Ha Ha.
Although I do know Kosciusko...the best Polish Bakery was on Kosciusko Street. After a few years I just mumbled it like everyone else!