I have no idea how she generated the text, but whether LLM or not, it isn't a recounting of direct experience. The author graduated high school in 2019 and never experienced the Internet of the 90s and doesn't remember pre-2006 because she was a toddler.
It doesn't have the usual giveaways of LLM text (except for the rather prominent dashes) but definitely has a similar verboseness and repetitiveness. Human writing can be like that too, if its author wanted to pad it out to a word quota.