First off, African American is an offensive term coined by Left leaning folks to imply that people who were born here, but have more melanin than most, aren't truly American, or perhaps belong somewhere else. I know a person who was born a Negro, raised as a colored person, worked as a Black person, and retired as an African American, all without anyone ever asking who he was. He was never asked if he wanted a racial identity, but was assigned one by the Blacker-than-thou folks who insisted on seeing everyone in the world through the lens of race.
But if we can move on from that, I hear in your telling of America that you believe America is a cesspool of the worst kind of people imaginable. While I agree that there are bad people in the world, I disagree with the proportions. Americans, for the most part, try to be good people, and find that getting their government to actually serve the people is quite a challenge, especially when the political ruling class wants it otherwise. To characterize all Americans according to the worst examples is to commit the logical fallacy of mistaking the part for the whole.
This does not mean that we don't have cultural problems, but that those problems have been exacerbated by the DEI folks ignoring the problems of integrating different cultures into the whole. Simply put, DEI inevitably creates unnecessary conflict. If everyone can get past the idea of seeing everyone through a racial lens, (and therefore assigning them a racial identity), we can, together, solve the greater problems facing America. Otherwise, the political ruling class exploits the division DEI creates, to the detriment of everyone else.
So if you really want us to become one America, one culture, all getting along, you need to drop the DEI. The average person has the interpersonal skills to resolve personal conflicts and treat others fairly, even without respect to race. Just because you struggle with discrimination doesn't mean everyone else does, and it's time for the DEI folks to realize their worldview is making everything worse for everyone else. We don't need racial identities, and seeing everyone through the lens of race has never served us well. Wherever you find people seeing others through the lens of race, ulterior motives are always present. It is time to instead see people not as black or white, but as children of God. Otherwise, the offenses against human dignity will continue, regardless of the degree to which DEI is embraced.