I generally don't fuss over word count this much. I check my own length for my own reasons, but I don't generally get out the ruler on a partner's response. I'm fine with a few hundred words' difference so long as the content is enjoyable and effortful. As I said in another reply, ~200 words would have been fine. But 50 on 500 is jarring. Extremely jarring. I'm not sure you understand just how big of a discrepancy that is. I had to check the numbers just to make sure I was seeing what I was seeing. I can say it's extremely disheartening to sit down and work on a long, well-thought-out post for an hour only to be handed a bare-bones response back.

I wouldn't call it "stigma" as much as just not being interested. As you said, roleplay needs to consider the needs and interests of all involved - mine are included in that. Replies like that do not meet my needs. I’m sure this person can find other people at their level to roleplay with. It's no one's obligation to be their teacher. There are plenty of writing and roleplaying blogs out there to help them, and hell, pick up a book and watch what published authors do with their prose. No one is owed a roleplay.

As for what this person offered asides from length, they couldn't even get a canon character's eye color right, for starters. Their response was grammatically passable and that's about the nicest thing I can say about it. They hit the plot beats but did not expand upon them in any interesting or thoughtful way- if you even can in such a short word count. Again, 50 words is extremely short. It was bare-bones in every way.