Hilariously, I did a search for "How to pronounce $my_last_name" and each result I checked mispronounced it the same way English speakers always mispronounce it.
It's just something that happens, and I don't blame them for it after so long. I get the feeling that Anglicizing or Deutchifying names is universal.
That sounds like a dialect, not mispronunciation.
> Americans are simply incapable of pronouncing anything even remotely foreign even if I enunciate it for them.
Ditto every other nationality, naturally.
Probably because they insist upon using dictionary respelling schemes instead of IPA, so they can't even notate the phonemes English speakers have trouble with. Of course, trying to learn how to pronounce a phoneme your native language doesn't have without one-on-one instruction is a doomed endeavor for most people, and I daresay you likely mispronounce any number of English words, given how idiosyncratically large the English phonological inventory is.