I've had the same experience with my immediate family (siblings, parents, in-laws). A few years ago, I made pretty clear that if their next phone wasn't an iPhone, they were on their own with regards to support. I set up iCloud backup (with a premium storage tier) and installed ESET NOD32 on every computer that I "support." There hasn't been a single "support call" in 3 years (aside from hardware and forgotten passwords).
It sounds cold, but now I actually get to enjoy time with family instead of being bombarded with technical questions. They're also less frustrated with their devices.
I can confirm that we had the same issue with my family. I switched them all to Apple hardware since they would complain of lost Wifi on their Laptops and confusing functionality on Android. Now that everyone has MacBook Airs and iPhone 6s, I have not heard complaints from anyone.
These days, it's about using Google Drive (who really owns a shared file?)
It sounds cold, but now I actually get to enjoy time with family instead of being bombarded with technical questions. They're also less frustrated with their devices.