<human>: This morning, I woke up thinking about an incident involving a few of my friends. A borrowed B's iPad to read a book and found B-F were being nasty about her in a DM convo on Twitter, which hurt A really badly. It was a mess. A told me about it a couple of months ago.

As I usually do when I wake up thinking about a thing, I tweeted about it--or subtweeted, in this case. I'm still angry on behalf of A even though I consider B, C, and D friends too. (E and F can go to hell.) B sent me a DM that rightly called me out for being subtweeting shitsock (I started subtweeting knowing I was such a shitsock, but ANGER) and elaborated on how the past few months have seen her struggling to get out of bed in the mornings. She's been doing especially badly the past few days because it'll be her first Christmas without her dad, who died a few months ago. Panic attack, sobbing, and the whole works of grief. I had no idea about any of it since she keeps that stuff off Twitter and we're really only Twitter friends and never talk about anything deep or personal. Oops?

Can you succinctly summarize the text in 1-3 sentences?
<bot>: I suck, my timing sucks, and tweeting while angry should be a prosecutable offense sometimes. Probably just lost a friend too.