AIO about my wife leaving blood and pads in the bathroom?

My wife is otherwise a very clean person, so this really confuses me. Whenever she gets her period, she will leave the wrappers from pads and tampons on the bathroom floor. Sometimes underwear with bloody pads too. She will also get blood on the toilet seat and not clean it. When I mention cleaning the mess, instead of fixing it, she gets defensive and mean. I get that periods suck, but surely this is a very low bar to meet?

She has now accused me of being immature from being grossed out by periods, which is not true. I have put up with this for years and cleaned these things myself. She also says that her behavior is normal for someone with a busy life, which I don't believe.

Her explanation for blood on the seat is (apologies for the graphic description here), when she removes a tampon the sudden release will make it swing and hit the underside of the seat. This sounds like a bad way of removing them to me but to be fair I've never had to do it. Surely one can just pull downwards, or grab the string higher up or something. And even if the swinging is unavoidable, you'd know and could just clean it, surely?