It's about CREDIBILITY, news outlets like Wapo and NYT vet their stories, they retract it or correct them when they get it wrong. It's inevitable that they will make mistakes now and then but it's about the trend which is why they are trusted. Lot of those anonymous stories turned out to be true - which directly led to Flynn firing and appointment of Mueller. Trump is being smeared by the truth, if they didn't lie about their collusion then this would not have been the big story it has become.
You can't complain about 'slanted' in one breath and defend the outright propaganda by Sinclain the next, either you are against fake news or you are not, if you are picking sides then it's just your own political bias talking and nothing else.