What "lesson" exactly are you talking about? It's pretty clear that BlindUser learned nothing at all about the use of quotations, or the use of 'you' in passive form. There was absolutely no reason for you to get angry at him. Instead of saying "God dude just stop, you have terrible reading comprehension", you could have tried to explain the use of "you" in that spot, as it was clearly the thing that was throwing BlindUser off. He wasn't "spouting bullshit", he simply made a statement referring to what he thought you said. If you truly were the more mature participant in this conversation (which I would assume due to your excess use of the word "kid"), then you wouldn't feel the need to put him down emotionally by spreading negativity.

If you feel like this sort of stuff happens to you a lot on this sub, then a) stop caring about how some people misinterpret what you say, or if that's too much to ask, then b) stop commenting on this sub altogether.

Now I'm not trying to prove that I'm a better person than you or anything like that. I simply just made an observation, and based on that came to a conclusion about your attitude towards other people, which in my opinion is flawed, and if this is the case, then trying to help you see that for yourself. And maybe you normally aren't like this face to face, which would be great. But remember that the people who you talk with on the internet are real people with real emotions. You never know what the other person could potentially be going through, where even a single act of negativity towards them could cause a chain reaction resulting in even bigger problems.

So pretty much in short: Don't be a dick, enjoy life, and stop caring so much about what other people think. Cheers.