Aita for moving on to fast

AITA for moving on "to fast"

I just announced to my family and my Instagram that I'm dating someone new.... And it's caused chaos.. My family is perfectly fine with it but my ex's family has been attacking me.... Let me give some context...

I (25f) was in a relationship with my ex for 9 years, we met in high school, I asked him out the relationship was fine.... Until I got my own apartment and hobbies his mom absolutely loved me, his sister hated me because I had male friends and she found it disrespectful and his dad was a very stereotypical "women belong in the kitchen" type of man. My ex always defended me I thought our relationship was good... I got a job at a call center enough for rent he was having trouble with his family so I let him move in with me at the time we had been dating for six years I didn't think there would be a problem... But then the seven year mark hit... He started drinking more, we started arguing more often and it came to a head when he did something hurtful to me one night when he was drunk. I wanted to break up with him then but he made me all these promises that he would change, I stayed but from that point I started to fall out of love... Our bed room went dead we hardly talked to each other... Then something happened on our 8th year of dating my mom got diagnosed with cancer...

I immediately packed my stuff and left, he didn't want me to go cried and threatened, I made a promise that I would call him everyday and that we could do an LDR but in reality I was relieved to be away from him, I kept calling him, on our 9th anniversary my ex said without me he felt lonely he requested an open relationship and I said yes, thats when I met my current boyfriend a nice bi guy I worked with... The thing about me is I'm demisexual so I needed to develop an emotional connection with someone to be intimate with them, this emotional connection made me realise I had completely fallen out of love with my ex, I broke up with him in September... Me and my current bf started officially dating at the beginning of November he's met my family they love him I announced it to Instagram and now I'm getting attacked by my ex's family, they are saying I betrayed him calling me all kinds of distasteful names saying no self respecting and loyal women moves on as fast as me, he is recently postied something horrific directed towards me on his ig story. It hurts because despite everything I still care about him I'm wondering if I did something wrong... Should I have waited longer to publicly announce that I was in a new relationship...

AITA for moving on "to fast" ?