The Raiders offense has broken down, stuck on the side of the road with steam coming from the radiator. There’s no fixing it now. A rebound game against the Los Angeles Chargers won’t fix damage already done. Not with a season already in shambles, with playoffs off the table after three consecutive losses. Upper management should already be focused on 2018, pondering how to remedy what has gone so wrong. Part of it’s execution. Part of it’s coaching. All of it is a mess. Stats aplenty will prove how bad the offense has been this season, but let’s keep it simple. Scoring points is the primary objective. The Raiders haven’t done that consistently enough. The Raiders are 6-0 when they score more than 20 points. They are 0-9 scoring less than that. By contrast, the 2016 Raiders scored 20-plus points 11 times and hit 30 or more eight times. They were 2-3 last year in games scoring less than 20, 10-1 when exceeding that mark. “There’s definitely frustration in why we can’t get rolling,” right tackle Marshall Newhouse said. “There was very little we couldn’t do, but we couldn’t finish enough. That’s been the story too often this year. There’s no lack of effort or passion or fire. It’s an all-around thing of execution. We haven’t done that well enough.” The Raiders rank among the NFL’s best red-zone offenses, but rarely get there these days. Giveaways are way up.