I understand the message you are portraying through the game, it's the kind of relationship that it's unhealthy and not good to remain...But honestly, even if there was the tiniest bit of hope that It(I want to nickname IT Caphet so bad for fandom purposes, because idk why but even though IT is not supposed to comprehend humans very well and not be forgivable...)
I just y'know? True form or not, eldritch being or not...Every creature deserves some love? It had...VERY unorthodox ways of showing it's love and promise to the protagonist, however they still showed it?
I don't know, maybe it's just because I'm fond of the idea of even if Eldritch beings don't understand how humanity works or how their emotions play out...I would very much adopt myself "It".
Just a lovely game afterall with a very complex conflict between the two characters present...And my inner struggle against "Should I forgive and adopt this thing or kick it out of the bucket"
(Spoiler:It's the first option)