Then you get into the strange scenario of realising the He could create more humans, to be even more happy. While there are certainly a fixed number of humans in our universe, you could then posit that He's created other universes (an infinite number) teeming with humans. It's a strange idea.
As well, if He likes creating humans so much, it's not being done very efficiently. You'd think that He likes misery, then. He's created, what?, roughly 60 billion humans? What portion of them were miserable? A pretty decent number, I'd think.