Why is family so TOXIC?

I recently moved back to my home state. I was away for 6 years in another state.. prior I kinds knee my family was toxic and always has been. To save $ I temporary moved on with my abusive so called mother.. she harassed me weekly and the final straw was when she broke my purse the zipper from the fabric and blamed thr cat!! I had other coffee cups in her garage and 2 randomly broke.
I had 3 weeks till my apt was ready, my so called alcoholic father and a step mom who's always hated me was upset that I asked to live there till my apt was ready. I moved out again, packed my car and kitten went to a hotel and then an Airbnb till I moved into my apt. Since I moved I'm also missing a bike helmet.
Why is my family so abusive and cruel towards me? They were not even happy to see me. Prior when out of state i came to visit 2 X during X mass.
The so called abuser (mother) would attack me, and tear down my posters as a teen.. all in my 20s she lied, blamed, denied, and played the victim.
My so called father has never had a loving relationship with me since he's wife hates me.. he has never stuck up for my, I've known her since I was 8.

I genuinely dislike and have little to no love or respect for these horrible low life people.
Why is family so TOXIC?
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