Is it normal to don't und understand markeplier e?

You can Google it. Three joke is basically that memes have gotten so terrible that this nonsensical mess is what counts as one these days. It's basically a satire of memes in general. Since it's all artsy and surreal, it's not surprising that people don't get it, as the image itself has no intrinsic meaning. The meaningful parts are the context of the image and the conversation surrounding it.

Nothing. Just satire. I don't get it either!

That’s basically the point of it.

nothing to get really