How Does A Toxic Person Behave?

How will a toxic person behave?

Undermines your work, career and hobbies.
Takes the side of the primary abuser in your life.
Uses "humour" to mask verbal and mental abuse.
Constantly criticises your appearance.
Acts differently with you opposed to how they act in front of others.
Play the victim while vilifying you.
Sabotages your potential romantic relationships.
Always lets you down when making plans.
Turns others against you.
No respect for your privacy.
Never celebrates your accomplishments.
Never supports you during hard times.
Passive-aggressive cyber abuse.
Betrays you by spreading lies and secrets.
Steals from you.
Intentionally triggers you with your pains or hurts.
Bans you from bringing up certain topics.