[Tknl]

Yes, this is abusive as your compensation doesn't grow with your time working. Your salary is based on an x hour work week. This system incentives poor software quality at the cost of your and your colleagues' time. My role and those of my direct colleagues is also salaried similarly with expectation of some overtime without additional comp, but that should be a rare hour or two. I do know of/work with other companies that have similar terms around on-call as yours. My employer does only 1 day at a time per engineer with a repeating 4 week schedule but we also have a support call center taking care of the majority of calls and only escalating to on call when necessary.