[ He'd like to believe him but Conrad has tried his trust more than once. Although in the end, for every time he has turned his back on their King his brother has always returned to where he belongs. Yet that doesn't mean he won't stop blaming Conrad for putting a heavy emotional strain on Yuuri.
And those last words leave him entirely speechless. He knows it's true but... it would be easier if he had someone to blame entirely. Acknowledging Conrad is right is not something he will accept easily, unfortunately.
With that in mind, after a loud scoff, he turns around to leave. A haughty, childish way to answer, sure, but sadly that is the only way he knows how to behave when cornered. ]