I’m sorry for your recent problems; it is not easy to deal with some of the things you’ve experienced as a young person. I can relate to some of your issues. It will get tougher.
Now, as far as your choices-thinking that going to California will put you in a better place-tells me you haven’t read the financial aid pages of those schools. You seem to have directly picked all of the Southern California public schools that are all very different, expensive, and will not give you a penny to attend. Those schools are all funded by the State of California which barely has enough money for the California kids. They don’t provide any scholarships to students who do not reside in California.
Additionally, what the posters above are trying to tell you is that those schools want students with high test scores and high grades, first and above all else. Your ECs won’t help you because you don’t have and can show the necessary test scores to do well at those tough schools. The adcoms may think you’ve spent too much time on ECs and not enough time on your studies.
Your home life has been tragic and you should write your essays on it, but it won’t compensate for those test scores. You may want to try applying to California private schools (Chapman, USD, etc) that have a little more money if your heart is set on California. Retake your tests and see if you can get better scores.
Applying to all of those California public universities will be very expensive. Save your application money for your instate schools.