I think it is a joke, though not one we’re supposed to be in on.
The hint is that that is a very well made map for someone who doesn’t understand how water flow really works. They turned the ocean trenches into rivers. It’s a parody of someone who doesn’t understand gravity but still uses it properly in demonstrating how it should look incorrectly.







I took OP’s reply as meaning they posted the meme as a joke, but assumed they got it from somewhere else.