Cousins always thinks he can play better, even after a big game like the one he had Thursday. Kirk Cousins could throw for 500 yards and five touchdowns and he’d probably still be hard on himself afterwards. It’s just how he’s always been. Even after shredding the Patriots for 299 yards and three touchdowns while completing 81 percent of his passes in a Thanksgiving night victory, Cousins was focused on some of the things he could’ve done better, including an interception and a couple other balls he didn’t locate as well as he would’ve liked. “If you look at the…