its really a special sort of hell youre going through...a hard place to be, for sure

Then the next minute, he’s apologizing and telling me he’s taking all his pain out on me and he’s terrified
i think you can take this at face value. see the hurtful things hes saying, and doing, for what they are.
it doesnt remove the sting, but practically speaking, you know what hes doing.
Is there ANYTHING that can be done to improve our situation?
it may take some time.
you might consider having a series of talks about it (primarily listening). you might consider the two of you getting involved in parenting classes. its hard to say. right now, the suggestion might make things more "real" than hes able to cope with.
what do you think?