We do rotations, two shifts. I spend at least two days a month working on alert prevention or faster recovery. So does my whole team. If anything big happens, I’ll spend four to six days (I tend to volunteer for resiliency work. My standards are higher, and I can actually talk about human factors instead of staring blankly or blamecasting).
So while other things are being “worked on” I can almost always name three of concrete ones we’ve done recently.
_That_ is how you effect change when your management and leadership is comfortable with the status quo, and if the colleagues you're fond of are too loyal to the company for their own good, maybe it's the kick in the ass they need.
Beyond that, your mental wellbeing isn't going to withstand the pressure of taking on a burden you don't appreciate so that your colleagues don't have to suffer as much.
Speaking only of your situation, your company isn’t going to appropriately comp you for the on call burden, and they’re going to string you along (“we’re working on it”) as long as they can. If you stay, you will continue to suffer, and unless your comp is exceptional, it doesn’t appear to be worth it.
They might change after enough folks burn out and/or leave, but that’s not within your control. Your quality of life is within your control.