when i was first on steam i used something really lame like chelle or something.
another one i used in some places was typemoonfag.
i used green bird in the funimation forums when i was obsessed with bebop.
guminyourhair was another one.
various weeb names including kaname hagiri, aozaki aoko, bazaka, and other cringy ones.
i used herkz_is_a_faggot in some places but not a lot of people got the reference.
herkz is this insufferable all around douchebag supposedly in charge of translating mahouyo, and anytime people asked him on the progress of it he'd reply in the most asinine condescending way.
after the elections i used hitler_would've_won, but i stopped because people kept spamming and messaging me with shit and i know how quick to armchair moderating steam is.
im not edgy btw, i know how lame a lot of this sounds.
those are the ones off the top of my head.