Hi Grace Marguerite! How's it going?
Your question as to "affluent & educated Black Americans" who "cry" --- emphasizing the word usage "cry" -- racism is a variation of an inquiry into "complaint" that is quite prominent, here on the Question and Answer board.
That is to say, there are questions about why black people "complain" about slavery, when it happened "so long ago," and so forth.
Your question indicates that you see a contradiction between the success of certain black Americans and their propensity to "cry" about racism.
But "crying" and "complaining" are the very first step, the essence of political speech, when you think about it.
Consider this: the American Revolution of 1776-1783.
Before the American rebels took action against Britain, don't you imagine that the colonials "cried" and "complained" together about how London was treating them?
Don't you imagine that they "cried" and "complained" together in the taverns? Don't you imagine that they "cried" and "complained" together in the pool halls and beer taverns? Don't you imagine that they "cried" and "complained" together in their churches? Don't you imagine they "cried" and "complained" together, first, in their homes, around their dining room tables and on their front porches?
Don't you imagined that they got together in groups of two and three and four and five and six and more, to "cry" and "complain" about the depredations London was subjecting them to, from their perspective (taxation without representation, quartering of troops, etc.)?
Don't you imagine that some of them might have been rich and successful? Would you, then, retroactively, take away the right and indeed duty, of rich American rebels to "cry" about the unfairness of it all, as a prelude to devising and executing a political and military plan of action?
My point, then, is simply this: "Crying" and "complaining" is the essence of at least the first stage of political discussion, the process of articulation of grievances, an ongoing, shifting analysis of the contemporary situation; and sometimes historical perspective is useful (hence, the tendency of some black Americans to "complain" about slavery).
"Negativity" and "Victimology"? Who among us would want to get in a time machine, travel back to the late-eighteenth-century, and tell Thomas Jefferson, George Washington, Benjamin Franklin, John Adams, Samuel Adams, Thomas Paine, and others to stop whining?