Regarding the admin in question making the statement that your prior conversation with db0 "wasn't with them" - fuck that noise. That attempt at rationalization alone is enough for me to call their action an abuse of power. I was in agreement with their thought process up until that statement, but using that as a justification reads as "I have authority and what I say goes." More than one admin on this instance has served as an illustration of the corrupting nature of authority.
That being said, you come off as the type of person who has far too often avoided, by virtue of hiding behind a screen, being punched in the in the fucking mouth for your cowardly behavior. If you know you're an abrasive asshole, don't be a craven little shit on top of it. Starting static and then hiding behind a hierarchy when you get your little feelings hurt in return is some real bridge-dwelling bullshit. You deserve the action that was taken, regardless of the piss poor "clarification" given by the admin in question. If that little wrist slap, which is far less than you ask for in consideration of the way you engage with others, is enough to make you tuck your tail and scurry off to find a new viaduct to settle under, good fucking riddance.