Debating online tends to be as beneficial as pissing into an ocean of piss and I wouldn't go slamming the developer just because you had a disagreement with somebody totally unrelated in a chat room. Respect needs to work both ways and after reading the conversation you were the first one to descend into name calling so some mild reflection on your part is probably best.
Viewing post in Do not join their Discord Server
I was threatened first and banned. If the user who I "threatened" is not also banned there is a double standard. I signed in on a separate account and joined the server to see they were still there. That user regretted not being able to assault me thank you for selectively leaving that out or was that magically "different" and "not the same"?
I honestly do not regret my refund.