I am going to go point by point in order of potential problems i see.
What do you mean by this? Your character can no longer be a CMO due to actions it committed IC. I do not see how this is OOC at all.
The message you posted from syn has a lot of charged phrasing in it. "lucky" "Extremely fortunate" "Do not attempt something so stupid again". This looks very clearly like a "You're lucky to have not been fired do not do this again" kind of thing.
It seems reasonable to me your other notes would be taken into account. It does show a pretty clear pattern of behavior. Your character has lied to CCIA, obstructed an investigation, threatened crew, attempted to bribe an NT employee and all of this culminates in you getting into some sort of drunken brawl with a crew member and abusing medicine. I promise i am not trying to be rude because this is probably the point of your character but that is an INSANE record.
We are talking specifically about you and your character's actions. It is entirely possible there is specific information in those cases that renders them less severe than what you did and it is entirely possible they just fell through the cracks in our staff team.
You're a member of command and you drunkenly assaulted a crew member. That is absurdly severe. Your character has a pretty bad track record for being a liability to NT in a command position. Is this complaint to get lancer to allow you to appeal the removal?