My child's grandmother is an cynical pessimistic *****.?

Hello everyone. I want to know if I am the only one in the world with this problem. I have been in a relationship with a guy for 7 years. I am faithful, loyal, loving, understanding and caring to him and respect his family. But his mom is so mean and apathetic. When I met her she was so mean and judgmental. I am a attractive girl you can see from the picture. His mother calls all her sons girlfriends ugly, dirty, slutty hoars. She hates when her sons met a girl and marries them. She uses any tactic to get her sons to hate them. In my case she played the I hate her because shes American card. She said "I want to be able to understand the girl I am dealing with. Why can't you be with a Dominican girl?" This was annoying because he is so immature and told me all the time that she hates me. She thinks I dress like a slut. blah .,.. No offense but the woman is no fashionista herself. She is 60 years old with a 2nd grade education from DR. In addition she is 4'11 and 175 pound (obese) and has yellow teeth wrinkly skin and is so superficial. She wears jeans and sneakers everyday. She wears Reebok she had for 5 years and judges the way I dress. When I wear classy suits, pencil skirts, and cardigan sweaters. In the summer I wear skirts and sun dresses. Anyhow whenever I am around her she is rude, judgmental, insulting, and belligerent. I tried to be nice to her on her birthday and spend the day with her six years ago. But she is so annoying and criticized me because I had not job at the time and her son did not either. When I did have a job she still talked garbage about me and said Im too ugly to be with her son. Her son is no prize. I broke up with him. Then he kept running back in my life and eventually got me pregnant. During my pregnancy his mom was a uber *****. She told him to leave me. I am way too fat and ugly for him now. When shes fat and busted herself. My boyfriend kicked me out and I lived in a loft with roomates for a while. Then he told me to come back and live with him. I never once asked the woman for anything during my pregnancy. She came to the hospital and when I was ready to give birth and said " My son doesn't like dominican." Thats the first thing you say when you come to the hospital to see your grandson. My mother said " She is so rude and annoying." She kept saying my boyfriends other baby mother is coming to see me. Then I went to her apt with the baby and she was even more annoying. Asking me if my family thinks hes pretty and the baby took the beauty away from me. She had no consideration for my feelings and could not just shut up about imperfections I knew I had from pregnancy. But the insults and annoyance did not stop there. I talked to my boyfriend and he is agreeing with his mother. His mom said something so ignorant and mean spirited " You want somebody too pretty for you." On the phone. I said I hate you and your piggy mom. I am moving out. So I did for a month. My childs father called me everyday and apologized that his mom is so rude and disrespectful. His mom apologized to me and said shes sorry and she did not have a very good upbringing and she never had a good relationship with her mother. I said " I don't care about her feelings if she does not care about mine." I waited a while about seven months. I lost the weight and my skin cleared up. But the mom is just a hater that I cannot visit or give the time of day. Honestly I rather do what the other woman do and never see her again. Keep my son to myself and never let him know his family. My childs father takes him to her apartment and deals with her. Ever since her nasty comments. What would you do in my situation? I asked god but I am so at odds. I keep leaving my partner. But he keeps asking me to come back. So he can have a relationship with his son.