Ex’s boyfriends mom is throwing shade

Hi everyone so I got out of a 6 year relationship around March. This relationship was very toxic there were times when he put his hands on me and I never told anyone about it he shoved me and constantly scratched my face and made me bleed. In the beginning of our relationship things were great we got along good and everything went well until we hit our 2 year mark things went downhill. Anyways I won’t say I was perfect but I always tried to fix our relationship and I felt like he never tried. Now that we’re broken up I still had his mom on my Facebook and I saw what she said saying “ if your mom tells you that someone’s no good for you believe her because she’s always right” and then she goes on to say “ I love my new daughter in law” I feel like my ex’s family never cared for me because I was very antisocial and I had a lot of anxiety being around his family. But after all of that I just don’t know what to think. He’s in a new relationship and was cheating on me during our relationship too. I feel sick to my stomach because I really loved him. And seeing that his mom said that gave me a knot in my stomach so I unfriended her. Anyone with tips on what to do… I’m just shocked by all of that it’s crazy how your life can change around in a few months…