The American Experiment is overall pretty good.
I’ve commented before how, as a racial minority, I can interact with cashiers, gas station attendants, hiring managers, etc. and sometimes forget that I’m not white. I don’t get gawked at. My neighbors don’t do a double-take at me, or harass me for my skin color. Almost never has anyone ever called me or anyone else in my family a racial slur. I’ve never been physically attacked for my race or anything else.
I think we often forget how difficult it is to forge a society that is 1) democratic, 2) a blend of different races, religions, etc. and 3) have people all coexist fairly peacefully. Relatively few nations have ever achieved all three.