Cruise ship business was being slowly dragged¹ into the public eye as of last year… and then COVID hit. I imagine things must have gotten only worse in the general chaos of the pandemic.
E.g. you will not find any carribean cruise ship from the big lines that is under a US flag.
I believe there are 0 US flagged ships that are part of the cruise industry that in the U.S.
According to WaPo’s report last year, the most commonly alleged crime is sexual assault (with a third of the victims being minors), and it is not required to be reported. Considering passengers have to put up with that, I struggle to imagine what many crew members have to deal with.