I hear you. I get called to drive 30 minutes to fix computer issues at my parents while my (formerly abusive) brother who lives around the corner is never called because "he works so much." (I have a full time job where I work late a lot, too). I finally advised that they need to write things down as they come up and when I have time on weekends, I will come resolve them. That has helped.

It's frustrating to be the fixer, and at least in my case this is part of my larger dysfunctional family role!