Nothing gets changed because people don't report. If people don't report, then the company doesn't believe there is a problem.
Amazing; that was cry from my company in early 80's. It didn't matter what the subject was; people had the perception that nothing was done so they didn't report. The company then said there was no problem. It could have been accommodation, crew transport, crew food, rosters, defect clearance etc.
It could be a company's response to a few grumps is to ignore and do nothing in the hope it goes away. Guess what; crews become lazy and the problems go away; or so it seems.
Disappointing that such behaviour still is alive.
Putin is excellent at it. Deny everything and have more stamina than the protestors: then they will find something else to protest about where they sense some success.