A Gamer that spends his time spamming and posting memes in chats and streams and always wants you to check dms while you're streaming because they think your content is boring and not original.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.