Kirk cousins is weak no dice. How good has he lead the redskins? I think they have a similar record as us. Great leader
The best predictor of won-loss record is a team's passer rating differential.
In Cousins' three years as a starter, the Redskins' won-loss records, Cousins' passer ratings, and the Redskins' passer rating differentials have been the following:
2015: 9-7 record, Cousins' passer rating 101.6, passer rating differential 5.9 points
2016: 8-7-1 record, Cousins' passer rating 97.2, passer rating differential 6.3 points
2017: 5-7 record, Cousins' passer rating 99.6, passer rating differential 11.7
The first two of those three years consist of roughly the expected won-loss records. For every 5.65-point advantage in passer rating differential, one win over and above an 8-8 record is expected. In other words, Cousins did his part to help his team have a strong likelihood of achieving a very good record (12-4 give or take a win) during those two seasons, while the Redskins' pass defense was relatively weak and prevented the team from achieving such a record.
In the third of those three years (this year), Cousins has again performed very well passing the ball, and the Redskins' pass defense has performed a good deal better, but Cousins' sack rate has jumped from 4.6% and 3.7% in the first two of those three years, to 7.8%, and he currently leads the league in yardage lost on sacks.
So, with that information in tow, I think it's very difficult to make a "poor leadership" argument sound convincing. It might be true -- who knows, since we aren't in the Redskins' locker room -- but we have enough other convincing information here to make that idea at least highly questionable. We certainly can't say with any certainty that he's "a poor leader," with this other information readily available.