I have not travelled HAL but having cruised with Princess and NCL some 13 times between the 2, the service levels onboard with regards to complaints have seemed to dropped. And sometimes to take the complaint post-cruise can be a challenge to get it resolved to your satisfaction. These cruise-liners are now more focused on bringing in larger than life ships every year and targeting the mass market. In your case perhaps taking the $100 that was offered on board would have been a start and then following up with the head office for additional compensation may have yielded a different result ?
We had an incident onboard NCL, they tried to rectify the situation, we accepted everything that they offered onboard but then still wrote to head office post cruise about the experience and how it was dealt with, I did not ask for any compensation but they came back with a $400 onboard credit.
Sometimes, it also depends on who you are dealing with at the headoffice, if it someone who is going by the book vs reality it can result in a different outcome.
Good luck