A lease is a contract where you agree to pay throughout the entire term. That's evil?
Most municipalities at least in the USA also have tenant-friendly laws on that books that mandate either or both of:
a) landlords are disallowed from refusing reasonable sublease (e.g. one that passes the same credit check etc that you did)
b) landlords must release you from the remainder of a lease if you leave and a reasonably suitable replacement tenant is found