He’s not Jekyll/Hyde, he’s Frankenstein, a monster who was created by his management.
This whole article read like a sad story of failed management. The company actively created a single point of failure in Rick. Something anyone in software or leadership should know is bad.
The tone of the whole article is about Rick being the failure, explaining how he was his own worst enemy and created his own demise. Management/leadership is about getting the best out of individuals, as well as getting the best out of teams. It appears that was never done at all here.
Rick was a scapegoat for failures in leadership.