Well I am not a novel reader but I saw someone say this in the comments before so spoilers ahead...
Ezra sells out Grayson to those people who were hunting down dominant alphas for money for his wife's treatment... So... Yeah. Ezra will become the bad guy
Ig love and money can make ye do anything
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I don't remember well but it was because even if he shows that he get along with Grayson in reality he also doesn't like Grayson and he just treat him well because he has to. It was that or it was because he was already contacted with one's of those terrorist groups that kidnap dominants alphas
Novel readers saave me what the hell was the last few panels about?! "No nothing" was so ominous :o why he got weird like that