I know all about not being a morning person. I'm not one myself. And yes, I do also get grumpy in the morning. So I definitely know what that is all about. You've used a lot of words to explain a concept I don't think is alien to anyone. I appreciate the time and effort you put into it, but it was a bit unnecessary, because my problem wasn't with understanding morning grumpiness or not. My "problem" is with the joke not being funny. (I don't exactly have much of a problem; I'm just expressing my dislike.)
So yeah, I know it's a joke, and it's not entirely serious. Still isn't funny, though. Most "me irl" jokes are unfunny, because they don't amount more than saying "me irl".
1. See something funny
2. Say "me irl"
3. The funny thing instantly becomes much funnier (Well, that's the idea behind it, but I'm not seeing it.)
They don't make the joke funnier to me. To give a concrete example... I was browsing an image sharing site, and an image of a naked man dancing strangely was posted, which was amusing enough in its own right. Then someone came and said "me irl" or something similar, and that was it. That's not funny. That's a literal "CTRL+C, CTRL+V" of the original joke except form the commenter's perspective.
To be fair, the joke "This is me before I had my coffee" at least adds a twist to the image. It's not just a literal copy-paste, but... I dunno, I've heard it so often, it lost all its humor to me. Every time I see an image of someone angry or asocial, I can expect to see a "me irl b4 coffee" joke. Same for seeing a "I did Nazi that coming" joke whenever you see something related to Nazis online