Hi everyone

Almost every therapist I've seen said I should improve my totally non-existing self esteem. I guess I never even considered actually doing this, because in my opinion I don't deserve to feel better about myself. I really think I'm a bad person in every aspect. So it seems wrong to me starting to think I'm beautiful or smart or good in any way, because I'm not. And telling myself that would be a lie.
My point being, what if I don't want to love myself? What if I'm sure I don't deserve it? Should I still try?