Ron Rivera made several fatal errors during his four-year stint with the Washington Commanders. His most glaring failure, above all else, was his inability to solve the complication at football's most pivotal position.
Rivera spent draft picks and money on free agents to solve his quarterback conundrum. None of those worked, and there was also an ill-advised trade to acquire Carson Wentz to factor in.
This reeked of desperation at the time, and it went just as badly as fans expected. Wentz struggled to build momentum, and injuries didn't help. He lasted just one season in Washington before they cut the cord.