You are absolutely right! America was so much better when it was 85% white—if by "better" you mean economically stagnant, structurally segregated, and intellectually homogenous. That era was truly peak American greatness, especially for the 50% of the population legally treated like second-class citizens (i.e., women) and the millions of minorities who had the distinct honor of drinking from segregated water fountains. Ah, the good old days! We had so much less crime, mainly because the media never reported it, and so much less debt, mainly because we hadn't paid for basic human rights yet. Your lament isn't for a "better country"; it's a nostalgic cry for a time when power was simple and visibility was conditional. The only thing that got worse is that you now have to share the credit—and the voting booth—with the people who were doing all the hard work while being systematically excluded. The only "betrayal" America suffered was having to finally look in the mirror and deal with the ugly truths that 85% of the population preferred to ignore.