Some of us here (myselves included, hence why I need to use other pronouns to refer to you) use pronoun sets containing this or very-similar neopronouns. As you've admitted, person-independent pronouns can be very confusing, especially when others in the same community or conversation also use those pronouns. I don't believe Draconic NEO is attacking you by comparing your person-independent nounself pronouns to nicknames; that is how you are using them, and it's disruptive and confusing for those who use them as pronouns. Normally, we could at least use names or alternative pronoun sets where this becomes a problem, but your username is sexually suggestive (probably why Draconic NEO mentioned it in the ban reasons) and you haven't been willing to offer any alternative. I can only speculate on why you're doing this.
I haven't communicated with you before, but I'm in two of the communities you listed here and comment occasionally in them. From past experience, I believe Draconic NEO acts in good faith to accommodate as many folks as possible, but your unwillingness to consider others' needs and repeated disruption of ongoing discussions are what prompted your bans. Transphobia and harassment have nothing to do with this.
I had to read this multiple times to make sure whether you were referring to me, yourself, or someone else. That's the problem. Multiple dragons are likely to want to use those pronouns in a place like c/Dragons wouldn't you think? The way you're using them is mutually-incompatible with the way everyone else uses them for themselves.
Also your display name is euphemistic. You already know it is because you put it in quotes.