It's nothing personal. Some people aren't being nice in the way they highlight this but it doesn't change the fact that it was "mispronounced", in a video about "mispronunciation" (if you regard American and British English as the only correct varieties of English in the world) https://twitter.com/PhoebeShafinaz/status/1253360168009490432

There are many diff varieties of Englishes around the world, and nothing "wrong" about any of them! I recommend looking up "World Englishes". Malaysian English is a famous example; I wrote about it many times in my undergraduate. Also look at BBC's Pidgin English website.

That American and British Englishes are the only "correct" varieties should be questioned. They are regarded as international standards, which means they are understood globally. So it's important to learn them, but without regarding Manglish as "wrong". Just "more localised".

I applaud the OP's efforts in teaching people how to pronounce words in ways that they might prefer. However, she needs to accept constructive criticism and we, as a population, should understand that "US/UK" ≠ "correct". It just means "international standard".