I've mentioned it on Twitter, on Discord and on my YouTube regarding the game. I've also mentioned it in comments previously to others, so it's never been a hidden aspect. I understand that you find the lack of mention disheartening, it was never malicious. The link (I thought) was apparent, even without me confirming it. I was hesitant to add the mention of 'Doki Doki Literature Club' into the game itself, as that isn't my game and it's not my property to be mentioning.