I have also had experiences myself that could be akin to misgendering, on account of the circumstances and intent surrounding them

That particular type of toxicity in egg culture is no different than suggesting to a lesbian that she just hasn’t taken the right dick yet. I will never understand what makes the people who partake in that behavior feel justified in their abuse. I’m sorry you had to go through that.

I am not a “cis person” as some very pejoratively and angrily call me

This also baffles me. Though I don’t see them as more than a vocal and offensive subgroup of the greater community, those who use “cis” and “cissy” in an abusive manner are reinforcing the acceptability of using slurs.

All that said, on to the most directly pertinent parts:

they would go by Me/My/Myself pronouns, and would scream transphobia if people didn’t use those pronouns

even noun pronoun users (i.e. demon/demonself) typically also use other pronouns like they/them or ze/zir because there are cases where noun pronouns just aren’t practical or are worse than just not using pronouns at all.

I do think that respect of pronouns is extremely important.

This is where we get to my own hard line. I respect people’s right to individual expression, but I do not feel compelled by that respect to play along with fantasies. I respect the right to choose one’s own gender identity on the gender spectrum, but I reject outright the idea that said spectrum includes anything and everything that one’s imagination may conjure.

In line with this, I firmly assert that first person “I/me”, “we/us”, second person “you”, and third person “they/ them” are implicitly genderless pronouns. As such, they are fair game to be used with impunity as one cannot be misgendered if no gender is implied by the pronouns used to reference them. Repudiation of good faith attempts to avoid gendering someone altogether suggests that one has no interest in finding any neutral ground, and may even seek to either weaponize compassion or undermine the identity of others.

In dragonfucker’s case, I’m not sure I’ve seen them outright reject gender agnostic second or third person pronouns. I believe there was a comment suggesting that they didn’t accept “they/them”, but that might have been another user accusing them of that. I also have not seen them reject “you”, so I am of the assumption that they’re acting in at least semi good faith.

That said, there is almost certainly some degree of dragonfucker purposefully acting disruptive and then crying foul when the disruptive behavior is addressed. I won’t guess at the motive, or outright condemn disruption as a valid way of making certain points. But I equally won’t defend throwing rocks and hiding one’s hands. If you aim to disrupt, expect to experience consequences. Otherwise, what is the point of disruption?

Edit: Before anyone brings it up, I am aware of the school of thought that regards “we” as belonging to “personal gender”. In my opinion, animacy/inanimacy are not germane to the discussion in this thread; if one can be conversed with, one is not inanimate.