Okay, so this happened on r/LGBTteens, I recently made a post asking why does the majority of the subreddit complain about a multitude of things yet make no strive to change or fix the problem.

Everything was going pretty well, I was answering and conversating with other redditors etc. This was this one user who just came off as pessimistic and negative, they said their reply (which was negative) 
and I replied with "if you say so". 

I replied in that manner because I don't get into conversations in which the person already has a particular mindset that is negative. It's hard to try to talk to someone who has already given up. 

So after I sent that, the user replied go fuck yourself.

So I replied with fuck you you depressed bitch. 

In this insult, depressed was an adjective and was not used as in insult. Not only that but the user also labeled himself as a depressed furry, so I considered it equal grounds to use the word depressed.  

After that I have been banned for r/lgbtTeens and  muted by the mods when I told my side of the story. 

So, AITA? The way I see it, I was defending myself against someone who was negative for no reason. 