By Daniel Chavkin Mikaela Shiffrin had a message for all of her critics after failing to finish another Olympic event. View the original article to see embedded media. Mikaela Shiffrin has dealt with more than just her performance struggles at this year’s Olympics. After failing to finish another race, this time the slalom portion of the Alpine Combined event, Shiffrin showed on Twitter the vitriol she has received on social media. Shiffrin posted pictures of quotes of criticism, including: “Can’t perform as soon as she has competition,” “Should have left the slope immediately after crashing t…