Pedantic: You mean Y-axis, right? Technically, neither start at zero but I think you meant Y based on context.

Just because “I have money but I am not happy” is a true statement, that does not mean that “if you have money, you will not be happy” is a true statement.

The solution I have heard before that I thought was the most interesting would add another arrow to the “Then why didn’t he?” box at the bottom:

Because he wants his creation to be more like him.

He’s just a lonely guy. He made the angels but they’re so boring and predictable. They all kowtow to him and have no capacity for evil (except for that one time). Humans have the capacity for both good and evil, they don’t constantly feel his presence, and they’re so much more interesting! They make choices that are neither directly in support of or opposition to himself. Most of the time, their decisions have nothing to do with him at all!

Humans have the capacity to be more like God than any of his other creations.