Not sure why you are complaining so vociferously, because the UCs’ admission policies tend to look favorably on applicants who overcame adverse or disadvantaged situations. UCs also do not weight test scores that highly relative to high school record for frosh admission (at least partly because they tend to reflect SES, but also because they are not as strong predictors of college performance as high school record), and do not use other criteria that skew admission toward higher SES (e.g. legacy). UC financial aid for students from low income families is better than in most states. The result is that the percentage of UC students with Pell grants (approximately bottom half family income) is generally higher than at similarly selective state universities in other states. For example, 42% of UCI students get Pell grants, compared to 32% of all college students. CSUs and community colleges offer additional college opportunities at low cost for California residents.
Be glad that you live in California, not a state like Pennsylvania, where the in-state public universities are largely unaffordable to students from low income families.