I hadn't heard that before, but that is exactly how I also pronounce it 😍

Your assumptions betray you. I speak 4 languages fluently/natively and two-three more poorly. English is not my native language.

This is not about language, but about marketing. Thank you.

I wouldn't call that "seething", the project is targeting an English speaking audience (English is the source, other languages are translation targets), effectively no one is a native speaker of Esperanto, and it's usage is small enough that someone could quite possibly never encounter the language.
Bad project names are common enough in programming and open source, and complained about, that I wouldn't jump right to xenophobia as the reason someone might complain that a project picked a name knowing it would be difficult to pronounce.

They can name it whatever they want, but getting that angry that someone didn't recognize a word in an anglisiced spelling of a word from a niche language is uncalled for.