Oh man. My condolences on your adult chickens. Heartbreaking loss
As for your hatch you've got a few things going (wrong end up, high humidity) so I'll leave it to the more experienced hatchers to guide you from here. But I will add a bit of hope. After 3 terrible hatches (my first attempts) I'm convinced some chicks are just intrinsically stronger and more inclined to hatch than others. I had one hatch each time despite me doing everything wrong. It's too bad you have to dial in your incubation skills with sentimental eggs. But they've developed so far. I'm sure you'll hatch something

I too have some Silkie EE mixes. Lovely little birds. I'm hoping mine go broody next spring.
I'll keep and eye on this thread. Please post updates, good or bad.