There is no such thing as an objectively correct pronunciation
But, there are patterns to the language and using a soft “g” sound doesn’t follow those patterns, so it’s objectively a less correct pronunciation.
the guy who created it
Who cares about that guy? He made a mistake, he should have looked up how words are pronounced before trying to get people to mispronounce “gif”. If he’d said it was supposed to be pronounced “dug” people would have just ignored him, but his attempt wasn’t that absurd, it was just slightly wrong, so not everyone ignored him the way they should have.
instead of a group of people being dumbasses and laughing at a correct pronunciation
It really sounds like you didn’t have friends. The rest of us did.
Also how people speaking other languages handle names doesn’t have anything to do with this
Of course it does. How you pronounce things depends on the language you use. How people pronounce the letters “gif” is based on their language. In English, it’s a hard g.