9 Days vs. 3 Years

The US-backed regime in Afghanistan lasted 9 days from the taking of the first provincial capital to the taking of Kabul. After the withdrawal of the Soviets in 1989. That government lasted over three years. What was the difference? Why after spending two trillion dollars and twice as long in the country did we do so much worse? Francis Fukuyama has asserted that the are no ideologies which can compete with liberal democracy. And everyone seems to believe that, but if that's so why did we have such a hard time implanting it in Afghanistan?