He didn't

A "sissy" about it? Ha. I get pissed off when people are too lazy to check the comments before they comment themselves; if they say exactly the same thing as someone else then that's just a waste of time for the people who get an update months after they commented. How is criticising laziness being a 'sissy'?

You wouldn't have said a thing if they copied someone else's comment. But since this concerns you, you just had to diss them for hurting your pride. That's how you're being a sissy about it IMO.

I have on several other posts done exactly the same thing - concerning both my comments and those of other people (obviously I'll do it more with my own as I remember them and know they're there; I don't always see everyone else's). Hurt my pride? Why would my pride be hurt? I was annoyed by their poor grammar and that they wasted 10 seconds of my time by dragging me back to a months-old post for nothing. (I don't think "sissy" is the right word for what you're trying to say.)

So you spend your free time correcting other people's grammar and dissing them for repeating a comment instead of enjoying new content... I'm not quite sure you're the one to be giving a lecture about waste of time.

All I did was comment that what they did was annoying - which it was. They wasted my time by alerting my to come here, but as I WAS there I thought I might as well comment that fact, I stayed because you responded and I didn't want to appear rude by just blatantly ignoring what you had to say - aaaaaand you were kinda rude about it. Continually. But ah well, some people just are. I'm off to enjoy new content. ¡Adiós!

I know it's an annoying thing to do, but do you truly believe that you'll fix anything by giving them a lecture? Do you really think they'll change because someone on the internet doesn't like what they do? You're only wasting your own time by trying to change someone, naively thinking they'll listen. But then again, that's what I'm doing as well. Sayonara!