A person who cannot control their reaction has already handed out leverage.

A predictable reaction is a handle. Anyone who knows what makes you angry, defensive, or eager to please can produce that state deliberately and work with the version of you it creates. This is not about suppressing feelings, which does not work and costs a great deal. It is about the gap between feeling something and acting on it.

Identify what reliably sets you off and treat those moments as the ones requiring a pause rather than a response. Buy yourself an hour. The feeling is yours; the timing does not have to belong to whoever triggered it.