This article says the reason we weren't involved was..." personality conflicts."
这篇文章说我们没参与的原因是… … “个性冲突”。
成长的烦恼 第1季
I have a personality conflict with my teacher.
麦克，6科6个不同的老师.
英语百科
Personality clash
Personality clashes occur when two (or more) people find themselves in conflict not over a particular issue or incident, but due to a fundamental incompatibility in their personalities, their approaches to things, their style of life.
A personality clash may occur in work-related, family-related, or social situations.