Tā bèi pīpíng yǒu tài qiáng de gèrénzhǔyì qīngxiàng.
He was criticized for having too strong an individualist tendency.
Tips
culture
In Chinese political discourse, 个人主义 has historically carried a negative connotation as opposed to collectivism (集体主义). In academic contexts it is used more neutrally.
grammar
Like most -主义 (zhǔyì) compounds, 个人主义 functions as a noun. You can say 个人主义者 for 'individualist (person)'.