The mod told me I had to end the conversation questioning his modflair (which is "just for jokes, because being a mod is hard") or be banned, after a couple comments. Then they told me I had to talk in modmail and banned me from the sub. Thus ensuring the other mods would have to take care of it instead of the one in question, and that I could be ignored in private rather than in public.
I was told I was being banned for not being respectful, then told by another mod I was banned for "not ending my conversation when asked to", aka you didn't shut up when we told you to so we had to ban you.
Then I make my counter-point in the modmail and they stop responding.
This is reddit 2019. Mods do whatever they want, break their own rules, but if you question them on it, you're banned forever and can never speak publicly in their forum again. Then they ignore you in private while pretending to let you have your say to defend yourself. It's Kafkaesque.
This is like the 15th sub this has happened to me in, over the years.
Reddit is so fucked.