What do you mean by strange temper?
An eccentric person may cause a series of inconveniences and discomforts because of his personal characteristics. For example, they may have difficulties in interpersonal communication, because they are likely to go against other people's expectations or not adapt to other people's living habits. In addition, they often cause discomfort to others because of their great mood swings.
A grumpy person is not necessarily a difficult person to get along with. They also have many respectable qualities. For example, they may have a strong sense of self, express their views and prove their views. At the same time, such people may also be extremely persistent people. They have their own life plans and values, and unswervingly advance their lives according to these plans and values.