Jiang Yi didn't have a good impression of Princess Ling Yue. It's not only her, but he also loathed all the other princes and the other princess from the Ling Clan.
When the Demon Empress marched the demonic beast army on the Stellarsky City, these princes and princesses had all fled and left Ling Xue by herself to be buried along with Stellarsky City.
Jiang Yi might have ultimately become enemies with Ling Xue due to their different paths and opinions, but he still respected Ling Xue greatly. She was a weak lady that supported the Azure Dragon Empire by herself and even made the empire greater than it was before. Princess Ling Xue was indeed worthy to be that genius lady who the Emperor wished to be a man.