Bears' rushing attack: The Bears started their rushing attack early and often on Sunday, as they had 26 designed running plays for a total of 106 yards, along with one rush from Andy Dalton for six yards to avoid a sack. David Montgomery had 21 of those runs for 90 yards and a touchdown.
Losing the turnover battle: If the Bears were going to win this game, they had to not turn the football over. Instead, Dalton turned the football over four times. With how bad the weather was, field position and time of possession were the two most important keys to winning. Turning the football over and giving the Cardinals great field possession doesn't help your chances. All four interceptions gave Arizona perfect field position inside Chicago's 30-yard line.
Poor Coaching: Matt Nagy did not manage this game well, at all. The decision to not bench Dalton after his third interception midway through the fourth quarter was terrible. The decision to not go for it right before halftime at midfield on fourth down with two yards to go could have been a game changer. Nagy's decision-making continues to get worse week-by-week. Key thing to note, his team went 4-for-4 on fourth down. Imagine if they went for it on fourth-and-2 at the 49-yard line.
Source : https://www.msn.com/en-us/sports/nfl/bears-vs-cardinals-recap-everything-we-know-about-chicagos-week-13-loss/ss-AARuMRc223