Evidence I've cited:
-the 2002 Metroid manga
Very few people have read the Metroid manga and even fewer care about it, and the manga doesn't matter anyway if it conflicts with the characterization in the actual games (which if the manga is indeed like Other M, it does). If it's not in the games or can't be supported
by the games, it's generally not going to be considered canon (
especially if the manga hasn't been released outside Japan). Now, from what I understand, aspects of that manga have appeared in the games previously, and people really haven't had a problem with it. Other M just tries to throw a great big dose of condensed stupid into the story, and that's when everything goes awry.
-the 2004 Metroid fusion text
And I fail to understand what you hoped to achieve by bringing that up. I remember finding Fusion's story incredibly dumb, but there wasn't anything offensive about Samus' characterization in it. Samus just talks about her former commanding officer and how she looked up to him in her early days as a Federation soldier. She then talks about how
she doesn't like to follow orders (which clashes with her characterization in Other M, by the way), and so she eventually left the Galactic Federation.
Honestly, I thought Samus' backstory was
fine in general in Other M, with the exception of stupid Sakamoto-isms like the upside-down thumbs-up and her constant, never-ending whining about "THE BABY". I think most people probably were as well. It was the
delivery and the particular details of it that people had issue with. What most people expressed problems with in Other M was how Samus reacts
during the events of the game (especially her nonsensical reaction to Ridley, which I've covered
so many times that if you don't know it by now you aren't even trying) because it makes no sense. Samus having all the personality of an original series Cylon didn't help matters, either.
-the quantified beliefs of real, live Metroid fans
So? I can do that too. You don't even have to try to find "real, live Metroid fans" on the internet that didn't like Other M and what it did to Samus' character. And what's that old saying? That however bad something is,
someone out there is the world thinks it's the best thing ever made?