Kaia Gerber confessed she has 'had disordered eating in my life' and revealed how the glare of public scrutiny affected the way she coped. 'People are like: "You look terrible," and it doesn’t exactly make you go: "Oh, good. Let me get over this mental illness then!"' the model and actress recalled, insisting: 'Negativity has never saved someone’s life.' The 24-year-old entered the spotlight as a teenager following in the footsteps of her world-famous mother Cindy Crawford, one of the top Supermodels of the 1990s. She has now offered her candid reflections on the way her own body image was impacted by those who measured her against…