I've gotten these sorts of emails many times over my career, as I'm sure pretty much every teacher has. My solution -- with students, as with other things in life -- is to just not take them personal (even if they are personal, like this email): Nothing good can come off that.
The reason why the email annoys you so much (and would annoy me equally) is that the student is asking for something you simply can't provide, and is doing so in a demanding way. But the reason you can't provide what they're demanding is not personal, it's factual: You just don't have the time. So perhaps something like this is an accurate response without being personal:
Dear ...
I'm doing my best, managing this and my other classes, along with the other responsibilities to my job and my family. As a consequence, it sometimes takes a little bit for me to give everyone the feedback they deserve. But as mentioned in one of the earlier classes, I'm committed to giving all of you feedback within two weeks, and that includes you. In the meantime, it's probably useful for you to already get started on the second assignment.
Best, ...