Has anyone been able to maintain a healthy relationship with siblings who have ignored your requests to help with Mom and Dad?

Has anyone been able to maintain a healthy (or at least somewhat satisfying) relationship with siblings who have ignored your requests to help with mom and dad, and reacted with disdain when you talk about the difficulties of being a caretaker? If we continue on the path we're headed, my kids and I won't have anyone but one another. I'm not sure that's fair to my kids. On the other hand, is a relationship with people who only (occasionally) show up for the parties, worth investing in? I'm pretty disgusted at the moment, at how everyone expects us to give up hours per day/week/month without so much as a call or text to show even minimal support. I understand they won't change. But, if you have positive thoughts or coping mechanisms on how to maintain relationships after such egregious neglect, please share. Hugs to everyone doing this labor of love. I'd love to read examples of people who were able to maintain relationships with neglectful family members. Anybody rise above? I feel like divorcing my sibs, and I might. But want my kids to have some family in the area. I need some inspiration.