Psychology says people who are never happy with other's works and like to do things on their own aren't always arrogant or toxic. Their behavior can have other explanations. Some people set high standards for themselves and expect the same standards from others. They may become uncomfortable when work does not match what they expected. Some may also find it difficult to trust other people with important tasks. In some cases, this behavior can be connected with perfectionism, anxiety, fear of failure or past experiences. Doing everything alone can then become a way to reduce uncertainty and maintain a sense of control.
