I understand your frustrations. Baby snakes can be very challenging and when things go south its easy to get discouraged. Since you have not outlined your exact enclosure conditions, its hard to say what went wrong.
Two main issues baby snakes that cause stress are handling and lack of a hide spot. Do you handle the animals? Little guys get stressed out really easily. People always love to show off their new pets to friends and family. Snakes need to get accustomed to their environment before you start handling them. This means that once you get a snake, put it in its enclosure with a hide spot and water and leave it alone. Offer appropriate sized food once the snake comes out to investigate its surroundings. Let it shed once or twice and have several meals in it before you attempt to handle it.
If you are doing this and your conditions are right, you should not have the snake dying.
The only other consideration is the source of your babies. Pet stores get their animals from wholesalers. I would go with an individual here on Kingsnake that specializes in the species that you want. Just about everyone here is friendly enough to help you out step by step.
Good Luck
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1.0 Albino American alligator, "Smoke"
1.1 American alligator,"Al Bite Ya & Molly"
1.1 Purple Albino Reticulated Pythons, "Gumbo & Abita"
0.1 Eastern Gaboon Viper, "Gabbie" Recently passed away at 24 years old 
Help me find this snake!
