If there’s one thing Kelly Clarkson remembers about the very first season of “American Idol,” it’s how much some of her fellow contestants got beaten down by online backlash. According to the singer and talk show host, she watched several people “break their spirit” on the show.During Thursday’s episode of “The Kelly Clarkson Show,” the host welcomed fellow musical icon Seal, who made a point to praise her for having the “courage” to put herself on a stage to be judged not only by the actual judges, but the entire audience around the country.But, for Clarkson, the experience was “a good boot camp.” What was harder was seeing other people struggle with nationwide input.“It was more hard, not for me, but to watch other people — I’m always that person, like, it’s hard for me to watch other people go through something,” Clarkson said.