Being stuck in darkness for 3 days with the smell of vomit and feces all around is pretty bad, especially when you've paid a boatload of money for a vacation.
Shitty, literally. Those particular issues all seem like results of negligence. As soon as the power went out they should have disposed of anything that could rot, that's just standard procedure anywhere else. Might not be able to do much about overflowing toilets but in case of an emergency I'm guessing no one would judge you for "going" into the open sea (for privacy they could have set up makeshift curtains). Granted it is over 3000 people but I'm having a hard time grasping that people started shitting all over each other when the electricity died.
They'll get refunds and a free trip to compensate. Fair for unforeseen circumstances.
I'm not saying what happened was not bad, I'm glad those people made it out relatively well, I'm just saying it could have been A LOT worse.. They weren't hijacked and they weren't caught in a storm or any other disaster, thank God. They all came out of the ordeal infuriated, agitated, and frustrated; that's pretty damn good and they ought to be grateful no one was seriously injured or wounded.
