My sympathies, you've gotten a pretty raw deal. > I have to be always on-call so nothing fails. You have agency in where you set your boundaries with your emp

My sympathies, you've gotten a pretty raw deal. > I have to be always on-call so nothing fails. You have agency in where you set your boundaries with your employer, perhaps quite a lot more than you feel or have been exercising historically. Decide how much you on-call you are willing to do and don't do any more for free. E.g. if you're paid to work 40 hours per week, don't volunteer to donate another 20 hours of work to the investors for free. Do your 40 and turn work comms off. Management has decided to under-resource your team, for management to understand this has caused a problem, they need to experience the consequences of the decision, and feel that it is causing a problem for them personally. You can help them understand the situation by limiting your on-call participation to a level that is sustainable and makes sense for you and your family (and leaves you with enough energy outside of work). Then if the system goes down when you are not scheduled on-call, you need to leave your managers to deal with the fallout until you are back at work in your scheduled business hours.