This is a stylistic and regional difference. The convention in the UK is to use title case for acronyms, and all-caps for initialisms.
Just use the original title.
That makes the title _right_, just not consistent with the conventions of a particular country.
Or if they did, the complainers weren’t important enough to matter.
Just be thankful that they didn’t name iMac MacMan.
That's a stupid name but at least it's a valid word.
But if an organization (for whatever reason that might happen) wrote about me, I'd expect them to capitalize it properly according to their style guide.