In all of the time we spend observing the Rebel Alliance, we never hear of their governing strategy or their plans for a post-Imperial universe. All we see are plots and fighting. Their victory over the Empire doesn't liberate the galaxy--it turns the galaxy into Somalia writ large: dominated by local warlords who are answerable to no one.
Which makes the rebels--Lucas's heroes--an unimpressive crew of anarchic royals who wreck the galaxy so that Princess Leia can have her tiara back.
The Case for the Empire