At least one answer to the conundrum of "not getting what you want is suffering; getting what you want is, too" that Schopenhauer identifies is serendipity.
life/the universe/fate/god/chance/whatever will cause positives (and negatives) in your life that you didn't actively want. Since you never sought them out, not having them wasn't suffering. Now that you have them, appreciate them!
life/the universe/fate/god/chance/whatever will cause positives (and negatives) in your life that you didn't actively want. Since you never sought them out, not having them wasn't suffering. Now that you have them, appreciate them!