I'm sorry your job was so crummy but "self" esteem is just that, how you feel about yourself. Your puppies love you :-) so pay attention to them instead of the people at the place where you use to work; figure out how to use your husband and sons and puppies to find the way forward to being someone you really like.

I felt similarly about myself and used my husband's faith in me in the sense that either I was as he saw me or HE had a problem :-) So I just accepted I am as he sees me (or how could he see me that way?) and worked from there.