"should not be paying 5.7 % interest to the ECB"

Nobody is paying 5.7% to the ECB. The ECB is lending to the banks, not to the state at 1.75%.

And the ECB can hardly to anything about the fact that the Irish state has since independence but especially in the last years at 3, 4, 5% at the capital markets. They get,perhaps, 5.7%.