When a franchise only drafts little more than 1 multiple-season starter (say nothing of being a standout player) a year in a 7 round draft, their rate of progress is never going to acquire enough talent to truly be "re-building". In today's NFL, a competent front office can turn an average team around fairly quickly with strong drafts, good free agent moves, and shrewd trades. It's actually statistically more rare to go 10 years with total futility, no playoffs, than it is to get to the Super Bowl.