If we played Denver, Oakland, San Diego two times each we'd probably be 3-3 at best.
The Bills find ways to lose games 50/50 games. Also losing at home is not an option. Good teams, playoff teams go 6-2, 7-1, 8-0 at home. A playoff team can go 5-3 but would need to be a decent road team.
Good teams find a way to win a road game at the Raiders, Dolphins, Seahawks, and Jets. The most winnable game there was in my opinion the Raiders game. A game in which the Defense collapsed and squandered a 25-9 lead. You can't blow leads and expect to be a playoff team.