He could be spiteful.

他可能怀有恶意。

《柯林斯英汉双解大词典》

The people can be wrong in an assortment of ways: lazy, spiteful, bullying or just dull and too depressed themselves to spread much cheer.

人则会以很多方式出现问题：懒惰的、怀有恶意的、咄咄逼人的、乏味的，以及情绪过于低落而让人高兴不起来的。

youdao

Her family is ungrateful and spiteful. When Maggie buys them a house, her mother flies off the handle, worried that her welfare scam will be ruined.

她有一个忘恩负义、怀恨于心的家庭。麦琪给家里买了一套房子，但她妈妈却因为担心自己的诈骗救济会败露而大发雷霆。

youdao

Historians, such as the eminent Yukio Hattori, have argued that such apparitions reflected the low status of women in feudal Japan, not to mention the belief that women were thought to be more spiteful and attached to life than men.

ECONOMIST: There is more than you think to the haunting of Japan