Bit confused on the ending I got

[Cyber Warlord]

So I just finish the game for the second time, wanting to get a different ending sense I got "leave" last time, I wanted to go for "promise" for my second playthough and look up how to get the others. I fuilled out the requirments to get it but somehow ended up with memory instead. Did the requirments to get the endings get tweaked or Im missing something? I got the 12 hours on my save file, I killed well over 120 enemies and died (more the most part on purpose) 6 times.

[Chaosian]

Can't do much but commiserate.
Best I can tell, the ending parameters aren't particularly well defined or easy to consistently trigger. There's a lot of guides, but they all seem to be regurgitating the same vague and unreliable information. Honestly, I wouldn't trust anything besides someone sitting down and reading through the scripting for it (and even then, it seems like the kind of thing that could be easily bugged).

I posted this in another thread, but to help convey the point:
My first playthrough I managed to get Promise:
https://steamcommunity.com/sharedfiles/filedetails/?id=2943896512
On the same save file, I decided to go back and get the last achievement I missed (die 16 times), so I went through the final boss and intentionally died about halfway through twice. However, seemingly no matter how I perform in the final boss fight, completing the game now gives me the Memory ending:
https://steamcommunity.com/sharedfiles/filedetails/?id=2943896570

Traditional wisdom would indicate that taking damage, sitting at low HP, and dying, should all affirm my Promise score, rather than degrade it. But you could just as easily say the game is rolling a dice to determine the ending, and I'd have just as much proof.