I'm in the correct age, and terminally online enough to understand most of it. I can say 3 things:

1. Kids don't actually use these. There's an overlap between the latest slang and brainrot terms, and most of the ones that don't overlap primarily originated in some slang or common term, but nevertheless the majority of the words here now exist as brainrot terms first, not actual slang irl
2. This meme is using most of them wrong. Most brainrot memes do.
3. This is one of the lowest effort esolangs I've ever seen, so it's not terribly interesting. It's literally just python with keywords and some vars replaced with brainrot terms. To see something actually high effort that's similar, see something like Shakespeare https://esolangs.org/wiki/Shakespeare

I know some of the words, but dont see the funny in it, but it's winter time so I am at a mental state like when Stan realizes he is a cynical cunt and everything is shit.

You cannot be young enough for this to be normal English, nobody uses this unironically/outside of their online media persona.

Maybe I'm old.