My ex husband and I used to get one from some friends who had moved away. For years, they were full of the usual boasting about the kids' violin grades and the husband's promotion. Then one year we got one to say he had lost his job for having an affair with a junior member of staff and had to take a poorly paid office job. The letter practically glowed with malice and bitterness. I was very sorry for the wife who did not deserve such humiliation, but not for him, as he was supposed to be my husband's best friend but had propositioned me (without any encouragement). He obviously thought he was irresistible.
Bags, you obviously have not received the type of boastful catalogue we are talking about - do people really think that 'friends' they have not spoken to for a year are going to be interested in the minutiae of their lives?
I use Facebook to tell friends about the happenings in my family, both happy and sad, as they happen, so there is so no need for me to circulate them once a year. These are people with whom I am in regular contact and they also post their own news to which I am able to respond appropriately.
I don't think anybody is being unkind - no doubt we don't tell the senders what we think about their missives.