We had an alright relationship until the kids were born, they moved abroad not long after we got together so didn't see them much, and when we did they would always come stay with us for up to 2 weeks at a time which was a bit suffocating but I put up with it.
Then when I had kids they changed, mil would always have opinions on my parenting whether it be going back to work, dummies, breastfeeding, disciplining or what I fed them it was always wrong. I was once outside in their pool and partner was inside with our eldest and he dropped something on his toe. Despite the fact he was inside with him - it was me who was the neglectful mother for being in the pool and sunbathing while he was inside with DS. I've heard her call me a cow to him when she didn't think I could hear.
They would make us go out with them until all hours with the kids so she could show them off. She was once so drunk she grabbed DS pram to stop herself falling with him inside and tipped it up. We're just very different.
I had severe PND (and depression during pregnancy due to hyperemesis) and I asked if they could wait before coming to stay with us after she was born as they came soon after DS was born and it was a bit much. This was early 2021 so Covid was still around.
Partner and his dad wanted to go to a huge darts match. I said I can't stop you but Covid is still rife, and we have a newborn. They both went anyway and lo and behold got Covid.
I said they should never have gone and if our newborn got Covid I would never forgive them as I'd asked them not to go to the darts. I was shouted at "no one ever fucking liked you. You're selfish (maybe I am), a shit mum, just fuck off" this was in my own house, with my baby in my arms. Partner encouraged this.
I walked out with the kids to my mums and remained there for a year. Sometimes i wonder if I've done the right thing going back. I blocked all of his family from my life at this point; very toxic. Nearly all our arguments are triggered by his family.