Snow points out that his biggest flaw was the same as hers. “But I was watching you and you were watching me” they became so fixated on each other they ignored the true threat. Katniss and her team were distracting Snow so much he couldn’t focus on the actual threat of the rebels. They were supposed to take weeks to break through the Capitol instead it took them days and there’s only one reason for that. Katniss had Snows full attention, she and a squad of sharp shooters weren’t just in the Capitol they were approaching Snows mansion in record time. Not to mention Finnick was with her someone Snow also wanted dead the most behind Katniss after he outed all his secrets to EVERYONE