I can only speak as the half of the equation in a hellish marriage where I was given the hell. I'll try not to personalize my reaction too much thereby, but it is difficult, reading of his self absorbtion, manipulations and nastiness. It's much too familiar to the person I'm so indebted to for launching this PTSD boat in the first place. Or helping to, since I was obviously willing to marry him in the first place.
You have 5 children? All of them needing and deserving your best energies, not what's left over after your husband has tapped the well dry. You quite obviously do your best but noone is actually Superwoman. There's no balance here, nowhere for you to go for energy and regrouping and healing as is the case in a balanced relationship. I'm quite impressed, in point of fact, that you've held together so well with SO much responsibility, even if it doesn't feel like it. Kids can be wonderful, also. I know my youngest can make me enrgized in the midst of absolutely the worst day just by being HIM and doing something endearing or hysterical. They give back, without knowing it or trying. Your husband does not, nor return love like they do.
It's so personal, 'telling' someone about their marriage, you know? I can only say that you know your limits, your heart and your needs. Hopefully you know what you deserve, also, which is peace. PTSD never turned me into a selfish, hostile, petty and hurtful little toad. I may wear the crap out of my husband in a ton of ways, have zero geunine ego but can at least say that please do disallow yours this reason OR excuse for his excrable behaviour. Again, I'm awfully impressed with all your energy and willingness to work so hard. The children of course deserve it, at this point it seems he just doesn't.
I hope one of your children does something fall-down funny today, like they do, to give you some moments of joy.