Typically we make memes we can relate to, but that might be hard for some of these. That's because they're completely absurd, and you can't relate to things like a giant spider-crab coming to wish you a happy Tuesday.
But as much as I can't relate to a monkey getting its brain taken out, I can connect with it in spirit. I too have experienced wanting to open my skull and pull my brain out; anything to give me a chance to forget about my responsibilities for a while and just zone out and relax.
Non-traditional memes like these are sometimes called anti-memes, where the joke you are expecting never comes, leaving the empty concept of the meme itself as the joke. But these are more than that; they are absurdist and unhinged.
You've heard of elf on a shelf, well how about "Elf in myself?" Accompanied by a photoshopped X-ray, that's what I would call a ridiculous meme. What about two onions? Imagine those. Heck, what about three onions? Now we're talking. These memes aren't for everybody, but if you have a mind that skews towards neurodivergence, then you might appreciate them and their unhinged nature.