As others have said, of course you've not overreacted and if the marriage is over then calling on time on it is the right thing to do.
You don't mention if his anger/frustration issues manifest in any other ways, or comment on the rest of your relationship with him, so in the absence of further information and considering the partnership of marriage...Could it be that he's also aware of his behaviour and doesn't like it?
I just wonder if he could be encouraged to seek help with a) his anger issues and b) his parenting style.
If this saves your marriage then that would be great, regardless, as their father it will help his relationship with your children because he'll still be part of their lives in the event of a split.
I'd suggest raising it with him in a calm and persuasive way, while trying to not come across (too) judgemental.
It's fair to explain that the issue is a marriage-breaker for you. But, assuming your family home is otherwise untroubled by his behaviour, I think its only right to give him the chance to change his behaviour and support him to do so.
Of course, this must come with alterations in routine etc that protect your children from being scared (eg he doesn't do bedtime alone). And it goes without saying that if this is a much bigger problem than you've described, of abuse etc, then what I've suggested isn't relevant.
Would perhaps also look at programmes like Three Day Nanny and Super Nanny. This is not an issue unique to you and doesn't necessarily warrant the breaking up of your marriage, some people do need help and new perspectives with parenting. He may already be well aware of his behaviour and be deeply ashamed- or will be once he realises how bad his behaviour is.
Naturally, if you fear for the safety of your children and self you need to prioritise this over your marriage.