How to let go?

growing up with my family has been tough i loved but there is so much trauma is my past I went a period time I used to read "a child called it" to make me fell better about my life the first five yrs of it i remember the neglectful father who work to much and the angry mother abusive mom and the emotinally crippled cruel brother and my sisters oh boy, not to mention my life outside the house and since my family is busy to deal with each others issues it was just swept under the rug, I supressed my feeling to the point of blocking out my memories but they have always been there giving severe anger issues I dont what to do