There was absolutely zero reasonable doubt she killed the kids. Period. The only "doubt" the prosecutor tried to manufacture was about why. Why is irrelevant - nothing in any rules or instruction says the jury is required to charge-shop. To cherry pick between four different outcomes.
The only questions the guy was looking at were 1) did she manually strangle three kids. And 2) is that murder.
I think all who are rational understand him completely.
The jury had to decide if she was responsible for her actions or not able to distinguish right from wrong at the time she murdered her kids. That fact that she murdered her kids was stipulated to during the trial.
Until we hear from the lone holdout, I would not believe anything the other jurors are claiming about him. Clearly they were frustrated and angry he refused to give in. But he got it right, they got it wrong in my opinion.