a) his story, one sided, is correct
b) he was fired because they were running out of money (even his "quote" of what was told to him doesn't say that)
c) his advice was really helpful.
And with respect to this:
"Next, I found a letter that was being sent out to customers, it was a huge pile of text that needed paragraph structure. I figured if I got it, I wouldn’t have read it, there were to many words and to much ‘blah’. There wasn’t a clear or simple explanation of what the users needed to do and there were no action words. So I worked on it, cleaning it up, cut the text in half and made it more clear. I submitted it through the appropriate channels as defined earlier."
There is no safe way to navigate that without stepping on toes unless you help the person who is working on this without regard to getting any credit yourself.