he made human reproduction to be automated
But you wouldn't automate harvest to happen in the spring, before anything is ripe, so why automate reproduction in a child? That's not intelligent design, that's plain stupid design.
I wouldn't say that God did a sloppy job with the design
It's not so much the design itself, but the timing of it, although I can think of plenty of other design flaws in the human condition. Yes, "orgasms for all" is brilliant - such a pity is has to be tied up with reproduction, then kids could enjoy it to their hearts delight without any unwanted pregnancies.