To be honest OP, I feel for you.
My DP can be incredibly frustrating sounds like something you've got used to generally over the years, not just a recent development.
You're panicking and lashing out.
Without being pregnant, I have also experienced that "Oh SHIT!!!" feeling... like Road Runner who chases himself off a cliff and then flails mid-air, noticing the chasm below. I don't imagine the hormones of late pregnancy help when it comes to regulating your emotions on this kind of thing.
Are you a perfectionist generally, towards yourself? Are you used to being the one who takes care of everything, and now you're anxious he won't be able to step up when roles are reversed?
Are you scared of other people's judgement – your family, maybe, your parents? Do you want to live up to their ideals of parenthood?
There's no way of knowing how it will all turn out. Your DP might come up trumps! You'll have to wait and see! And if not, you can post another thread one day to sort that out.
But now, try not to panic. Just keep taking deep breaths and putting one foot in front of the other, and try to focus on your own well-being and that of the bab.
There is no rush to have the perfect life. No one's life is perfect. Just have the best life you can manage, right now, in the moment. The future isn't here yet, no need to deal with it or waste energy on it. 