Also the CEO, COO and CFO were sentenced to prison.
Andrew Fastow committed suicide
Ken Lay died of a heart attack before his trial
Lou Pai walked away with $250 million and disappeared
The litany of charges that were brought against the rest of the people involved have not been very successful:
https://www.chicagotribune.com/sns-ap-enron-trial-glance-sto...
All of those sentenced in the above article were for reduced sentences since many of them testified against Skilling and others in order to get a shorter sentence.
The only one who served any real prison time was Skilling.
Aside from that, totally agree. Many of the people who benefitted from the Enron disaster walked away without consequence. Very unsatisfying end.