This reminds me of when I was a teenager, spending time chatting with multiple people simultaneously on MSN Messenger and AIM (man, how did I manage that?)
There were some people who'd just say, "I'm bored." That's it. I never knew how to respond. I usually said something like, "Oh, that sucks." But their conversations never went anywhere besides complaining about boredom, so I usually stopped talking pretty quick. I get the impression they were just looking to have me entertain them somehow, despite putting no effort into making it worth my while. Bruh, I'm having three other conversations about fascinating topics, catching up with a friend living in another continent, and participating in a group RPG, all without anybody whining that they can't think of something to do. Step up or step out, your boredom isn't my problem.