I'll be honest, in part there must be something that influences me not being able to find the second ending, as I think, it may be because my English is terrible and I always depend on the translator as at the time of writing this message , (I have literally translated the entire game xd). Another thing that could happen is that I'm searching wrong, which if it really happened would be very depressing.
And the last thing that occurs to me is that it may happen that I am skipping some intermediate scenario, in the sense that while I complete the main scenarios, I don't know if I am skipping something secondary that influences the ending.
That is like my general vision, sorry if my comment is very confusing due to the mention of my English and thanks for the discord link, I will enter in a while.