To be fair you did say they didn't want to know.

If I ask you a question then I want an answer. If you say "you don't want to know" then you're frustrating me and I will quickly lose the empathy I reserved for you. That's likely what happened here. Next time answer the damn question or don't be extra butthurt that someone didn't harass you into a conversation.

That was rude but honestly if you weren't going to talk about it then it shouldn't bother you that they didn't want to listen.

I think "You don't want to know," is a pretty strange response to this question asked by a professional coworker. You don't have to lie and say things are good when they aren't. However, how are they supposed to respond to your comment? How are they supposed to know why they don't want to know? If I were told that from a coworker, I would take it at face value and not continue the conversation, as it's not professional to be intrusive. They sound a bit rude, but they're teaching you a solid lesson - if you say they don't want to know, why should an acquaintance want to know? Just be straightforward.

i dont want to be mean, most people i associate myself with dislike negativity when trying to be positive, for the reason that its hard to help as it is.

Your coworker's response does come across as rude. On the other hand, said response is merely acknowledging an assertion that you yourself made. If you wanted to talk about it, you should have just talked about it instead of being coy. If you actually wanted to be left alone, be glad that you got what you wanted instead of being bothered further.

Well what did you expect when you give an equally rude response to a question? All you could've said was that you don't want to talk about right now, or that it's a private matter.

He agreed with you, so what's your problem.

This fml could easily be: "today someone agreed with me" or "today I fished for attention and didn't get it"

I have to go through this everyday at work myself. It's socially polite to ask "How's it going?" or "Howre you doing?" And the way to answer is always "Good" or "As good as I can be" or "It's going." Never anything that can bring down someone else's day. Who wants that??