He writes for a living so presumably his files are of considerable importance to him. His rage is quite palpable (from the second tweet in the thread):
> Whoever designed and pushed this literally deserves pain in their life. I cannot imagine how much fucking misery and distress they brought into the world. If you are out there, fuck you. Personally, one human to another, fuck you. If I could physically hurt you, I would.
Keep in mind this is coming from an extremely measured, empathetic and thoughtful individual; not someone quick to anger or likely to rant on social media.