Again, at no point did he do what you’re all claiming and pretend that anyone using it is confused about the origin.
nigga he is delusional.
if the original japanese twitter user incidentally used a slightly altered version of an expression used in a VN from a decade ago, that is quite literally just happenstance.
this is like that self aware schizo meme where people try to make associations between random words, to arrive at a predetermined conclusion, usually for comedic effect. except this guy is serious, and really thinks people going "OHHHHHH" was some great cultural signifier or something. it's lunacy.
Edit to add:
If we are going down the autistic route of studying the lineage of memes, I feel like it would be apposite to draw attention to the oft forgotten definition of the word "meme".
A meme is essentially a cognitive version of a gene, conceptualized by Richard Dawkins as having the same strong/weak dynamics as physical genes inside of our bodies. Strong genes survive while weak genes do not - the process is called natural selection.
You can clearly see the connection to memes, especially in the Internet age. Strong ideas persist, because they hold up to scrutiny, stand the test of time, are generally more advantageous for people, and in the process their influence grows as more people adopt them. If they weren't strong, then they would be replaced by other ideas, as long as someone is smart enough to think of them. Strong Internet memes persist because of slightly different things but nevertheless, it follows the same formula. If it's funny, relatable, or interesting enough, then an Internet meme will persist and be repeated, growing in size and influence. Soyjaks and soyjak culture are one such example.
As for why the "uohh" meme is persisting, I believe it is because pedophiles have few ways to express themselves openly without immediately painting a target on their backs. If they couch it in an innocent sounding meme, adapted to reference anime lolicon (a sacred cow for retard coomers), then they can get away with basically saying "I am a pedophile".
If you insist that this meme is merely a corruption of an older one, then it seems as if you are railing against nature. This meme is strong, the other was not. This one survives and thrives, the other is forgotten. I fail to see why it is necessary to cry about it and argue endlessly and insist you are simply not being understood.
Wind blows, rain falls, the strong prey upon the weak.
Memes. The DNA of the soul.
