What kind of unforced errors did we make as egregious as the kick returner letting the ball sit in the end zone, the opposing kicker missing the landing zone, or not knowing the rules?
How about Riq giving up both a deep conversion, and subsequent a TD in game 1?
How about Riq's drive extending taunting, and subsequently giving up a long TD in game 19?
How about a really dumb, poorly designed gadget play with Milroe?
All three of these were in close games, two losses and a narrow win, where the unforced error kept the game closer than it should have been.
The architects of these three unforced errors are no longer with the team.
Kick returner letting the ball sit in the end zone did not affect the outcome of the 31-17 Seahawks win.
Landing Zone error and Not knowing the rules did affect the game outcomes.
Close games happen in the NFL, as do dumb mistakes and dumb luck. They tend to even out with time, as they did this season.