I'dn't've - A mean way of saying 'I would not have done that if I was a

A mean way of saying 'I would not have done that if I was a saint and you were a sinner.'

'I'dn't've taken the blame if you weren’t a complete idiot.'

'I'dn't've let you win if you cheated and I was blind.'

'I'dn't've said that if you were wearing my socks.'