Who is "we" and what did we "win"? If you're talking about the Soviet withdrawal from Eastern Europe, the Russians decided it was time to end the Cold War and did so of their own accord. They were decent, gracious, and magnanimous to stand down as they did, in the purest desire for world peace.
After that, the U.S. leadership acted treacherously and deceitfully, ratcheting up their globally aggressive policies even more than before.
That may be (as you say) realpolitik and all about power, but even then, the U.S. leadership fails on that point as well. What have we gained? Where are our spoils of victory? Why is our economy sputtering at the edge of an abyss?
If we look at today's situation as any indication, then "we" didn't win anything. "We" lost - big time. Anyone who advocates that the U.S. continue with the same failed, self-destructive policies is either a traitor or a fool.