Pythons in Florida, Eurasian milfoil and purple loosestrife all over the midwest, zebra mussels fouling the Great Lakes and don't get me started on starlings and English sparrows. These are all the result of someone introducing non-native species into an area.
Try the local chapter of the Humane Society and ask about their rescue program. If they have one, they'll be able match your turtle up with someone who wants it.
For cage pets, life is just a cage. The quality is variable, but the condition persists.
Sorry.
Keith