人海孤独症

Literal translation would be 'solitude syndrome in crowd/sea of people'. Referring to feeling extremely lonely despite surrounded by crowds, which captures an existential theme prevalent among modern youths facing societal loneliness despite bustling environments. This sort of net name probably conveys feelings about being alienated or out-of-place in the busy world, and perhaps looking to share experiences of inner isolation amidst superficial connectivity with others on Internet platforms.