From the perspective of psychology and behavioral science, habitual denial of other people's or one's own views may indeed be related to an individual's level of self-confidence, but it is not the only psychological root. Here's a more in-depth analysis of this behavior:
Low self-esteem: Lack of self-confidence is often associated with low self-esteem. A person may feel that they are not good enough and therefore make themselves feel relatively superior by denying others.
Defense mechanisms: Denial may be part of a defense mechanism to protect oneself from criticism or harm. A person who regularly denies others may be unconsciously afraid that others will deny them first.
Desire to control: Some people may deny others in order to assert control and power, in which case the denial may stem from a need for authority rather than a lack of self-confidence.
Negative thinking: Long-term negative thinking habits can cause individuals to tend to see the negative of things and ignore the positives, leading to frequent negative behaviors.
Communication mode: The communication patterns learned during growth can influence an individual's behavior. If negative behavior is often encountered in a family or social setting, the individual may imitate this behavior.
Anxiety and fear:A high level of anxiety or fear may cause an individual to be aggressive or defensive in communication, including frequent denial of others.
Habitual denial of others can damage relationships, leading to the following problems:
Lack of trust: Persistent denial can cause others to distrust the person who is always negative, feeling that they have difficulty communicating and cooperating.
Communication barriers: Denying the views of others can hinder open and honest dialogue, which in turn hinders effective problem resolution and conflict mediation.
Emotional stress: This behavior may cause frustration or anger in others, increasing tension in the team or relationship.
Social avoidance: The person who is denied may begin to avoid the person who is always negative, causing the social network to shrink.
February** Dynamic Incentive Plan The formation of habitual negativity can be related to a variety of factors, including early family environment, educational experience, social interactions, and personality traits of the individual. Repetitive patterns of behaviour eventually become habits, and if the negative behaviour is reinforced early on (e.g., attracting attention or avoiding an unpleasant situation), the behaviour may become more entrenched. 
Self-awareness: The first thing to do is to be aware of your negative habits and understand the reasons behind them.
Positive mindset: Practice positive thinking, looking for truth in other people's opinions, rather than immediately denying them.
Communication skills improved: Learn effective communication skills such as listening, asking questions, and empathy, which can help build more constructive conversations.
Cognitive remodeling: Identify and change negative thinking patterns through cognitive-behavioral**, etc.
Seek common ground while reserving differences: Practice finding common ground in conversations instead of focusing on differences.
Self-expression: Learn how to express your opinions and needs in a positive way, not by denying others.
Social skills training: Participate in social skills training courses or workshops to improve your interpersonal skills.
Seek help from a professional: If you have trouble changing this habit, you can seek help from a counselor.
Through the implementation of these strategies and methods, individuals can not only reduce negative behaviors, but also increase self-confidence and social skills, which in turn can improve interpersonal relationships and personal well-being.