Oh no I'm so very very sorry for your losses.
Personally I think a lot can be gained from seeing the aftermath after a predator attack. But from experience I know it can also be extremely horrendous. We've had losses, too many losses, but never so many at once. Again I'm so sorry. I've been there before when you're wondering should I really, can I, do I want to start again. Do what's best for you right now but don't beat yourself up too much or your DH. Mistakes are made by us all but sometimes you can't keep them safe no matter how hard you try. All we can do is our best.
Don't give up you can do this. I would contact the DNR they should know these coyotes have become so bold. I would also put up a game camera if you have one and then I would deal with the whole pack if you can. Now that those pups know what chicken is you can be sure they'll be back.
We will be rebuilding our coop next year after rat and mink attacks. Underneath the inside and outside walls; wood siding outside and I forget what it's called inside but it's washable and water proof, we will be lining at least the bottom 2-3 feet with hardware cloth with either chicken wire or a larger welded wire fencing on top for double defense both the inside and the outside. Part of our reasoning for this is to keep predators and rodents out.
We had a serious problem with predatory rats 18 or so months ago which brought in a mink. Actually it wasn't the first time the mink was here. Anyway we worked for months to get rid of the rats and tried to get the mink. We were unsuccessful with the mink but now we are worried the rats are back or will come back.
Our coop does have a foundation however the rats chewed right through it to enter our main coop walls the first time. If we ever lay the foundation for a coop(this was an existing building) we plan to run metal in the foundation to deter chewing.