While I share your outrage, he was not indicted by the federal government, so this had nothing to do with the justice department. This is a Texas state prosecutor letting him off easy for securities fraud.
Paxton though, being the repeat offender he is, does have a separate ongoing corruption investigation that is department of justice led. It’s confusing when you’re breaking the law so often like Paxton. We’ll see if that probe can bring him into a federal case where lackey state prosecutors won’t be there coddling him.