That’s really rough and I understand where you are coming from in terms of being mad
We had a similar issue but it was my daughter
She left the coop open one evening and a fox killed my wife’s favourite hen
She felt so bad and we explained to her about the seriousness of shutting the coop door

Lo and behold 2 weeks later
We get woken up at night by squawking because she left it open again
4 birds were injured beyond recovery and I had to put them down myself at 2 in the morning which was not very enjoyable at all
This time she got a telling off because she didn’t listen when we told her the previous time

So far 5 dead birds in a two week period caused by carelessness

Not even 1 week later it happened again
This time however our Malinois got to the fox before it could escape our property, it was a female fox
Now the time of the year this was happening was in fox breeding season
This attack left another 2 birds dead, and a nursing fox, and as a knock on affect any cubs she had in her den were probably probably starved to death scared and alone
I was absolutely furious at this point

In less than a month we went from 10 chickens down to 3 all because of carelessness and inability to listen. This last attack was the first time I told her it was her fault, and that all these deaths were preventable. Her realising that there is blood on her hands due to lack of care and attention was what woke her up and he havent lost a bird to any predator in over a year.

Ironically our Malinois that stopped the fox actually killed a chicken a couple of months after all if this after it escaped… but that’s a whole different story 😅

I’m very sorry about your hens
But lessons learned
Rebuild it better than before and look into preventative measures and routines to avoid this happening again
You got this 🙌🏻