Yes, they are very, very BAD at it and it just about proves they had almost no capability to pull-off some overreaching master planned conspiracy to rig the election using secret Russia help because they would have screwed it up so badly it would obvious to even untrained eyes.
Conversely, they have no idea how Russia did it and, therefore can't believe (accept) that the wiki leaks created enough uncertainty in 1% of voters to tip the scale.