She has a tendency to vacillate.
His tendency to vacillate makes him a poor leader.
I always vacillate when I have to choose between curly or straight fries.
Yes. People who vacillate are often poor leaders.
She'll vacillate between the two options and have difficulty making a decision.
Vacillate - to waver in opinion or mind; be indecisive or irresoluteSentence:Her mood vacillated between hope and despair.
vacillate:
My sister is very vacillating; she takes a long time to decide what she wants to wear.
Stabilize is the opposite of fluctuate, vary, adjust, and vacillate.
Three
vacillate "It's not unusual to vacillate about the 'good's and 'bad's of such a big decision"
vacillating