And, beyond what his ego would or would not allow him to admit - impaired executive function makes it impossible for him to even recognize his deficit.
My spouse has impaired executive function (diagnosed). I struggled, for years, to make her understand she was impaired and to get tested in case it was something that could be easily remedied. All that happened was that she got angry, insisted I was wrong, etc. There are times she has told stories about things that happened to me in the first person. When I correct her, she is sure they happened to her. But as to anything that requires complex thought - she believes her reasoning to be perfect and mine flawed. When the flawed reasoning shows up, and it is something that matters (it will cost a significant amount of money, or impair legal rights, for example), when she can't follow the logic she just gets mad and tell me to do it. It was not until after her diagnosis that I was able to understand that she wasn't in denial, in the classic sense - she was merely incapable of recognizing reality. So - unless there is an important reason to impose reality on her, I just try to live in her world.
But - this is the same behavior described by Trump's inner circle when they have to reason with him. When something takes any level of complex thought, or tries to make him recognize the reality of the consequences of what he is doing, he just gets angry, yells, stomps off, etc.
Your issue was aural memory - which you have the executive reasoning skills to recognize and compensate for.
While I don't disagree with Trump having a massive ego, because his executive function is so impaired, he is literally incapable of recognizing how flawed he is.
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