99% of the [thing]_official accounts on tumblr aren't real, they're just people pretending to be official accounts at varying levels of commitment.
the post popular one is probably osha-official who committed so hard they got a misdemeanor for impersonating a US Governmental service
Mansplaining (a blend word of man and the informal form splaining of the gerund explaining) is a pejorative term meaning "(for a man) to comment on or explain something, to a woman, in a condescending, overconfident, and often inaccurate or oversimplified manner"
i should clarify i am not the person in the screenshot lmao