Wow. How honest you are. I phoned King Solomon about this (he was the wisest man who ever lived) but his phone was constantly engaged. (I can read his advice in the Bible in his book called "Proverbs" - which means 'wise sayings.')
The answer is not easy. We are all of us come from different families and backgrounds so are all different.
One: Show a child meanness and they will grow up mean.
Two: Show them kindness and love and they will grow up showing kindness and love.
Three: Show them violence and anger and that's what they will show growing up.
In all three, a person can change, given the right example by the right person.
A great mentor of mine, Zig Ziglar said in one of his public addresses: "You're where you are, you're what you are, because of what has gone into your mind. You can change where you are, you can change what you are, by changing what goes into your mind." (Zig Ziglar, Perth 1984) Zig also said: "We need to get this matter of eternity sorted out if you truly want to be happy." (The God bit.)
Now, you could be sick, eat too much of the wrong food, watch too much TV, or live in a house that has mould and/or various poisons going into your body. This needs a doctor to check it out.
Do you have one good friend? We all need one. Talk to that one.
Finally, sadly – abuse.
This can be physical, emotional or sexual. IF...somebody is touching in any way your private parts (what's under your bathers) and you hate it, it is wrong, very wrong and even criminal. They can even be in your family – you must have it stopped. Tell a policeman or policewoman, someone in authority, a teacher, or a chaplain. There are now (in 2019) many chaplains helping people out in many different groups. People can go to jail for doing such evil things.