Why is Leo angry with Salzman after meeting Lily?

Leo feels betrayed by Salzman after meeting Lily because he realizes that Salzman has been hiding important truths about her identity and their connection. This revelation makes Leo question Salzman's motives and trustworthiness, leading to feelings of anger and disappointment. Leo's emotional response is intensified by the sense that Salzman's actions have complicated his relationship with Lily and put him in a difficult position.