The problem is that if yiu don't respect yourself it doesn't present the environment for others to respect you. It is lack of respect for people that causes many people to treat others badly. It is not right as we should treat everyone equally (unless of course they are abusive to us). Then we just move ourselves away from those people.

Therapy to learn self-esteem, self-respect & how to stsnd up for yourself.

Yiu might also look into the DBT section on Interpersonal effectiveness.....it teaches very useful skills in this area.