The thing that made me so angry about this is that a huge point of whistleblower laws is that it doesn't matter what the motives of the whistleblower are. Of course many whistleblowers are disgruntled for various reasons, but who cares? Whistleblowing laws aren't about taking the whistleblower's accusations at face value, it's just about protecting whistleblowers' ability to bring inside information and evidence to light, and then that information can be investigated independently.
The push by folks like Rand Paul to expose and condemn the whistleblower was one of the most disgusting political acts I've ever seen.