He comes across simultaneously both as an annoying retard and a pretentious douche.
He'd a regular on a podcast where both those traits are on full display. Its called the The One Piece Virgin Podcast. Nuxtaku, two of his friends, and (usually) a weekly guest read through One Piece from the start. The gimmick is that one of his friends (the titular One Piece Virgin) hasn't read it before and so the others get to see his first impression. Its decent background noise if you're a One Piece fan but Nuxtaku can make it a really annoying listen.
Nuxtaku seems to be incapable of letting anyone else have the spotlight. He constantly interrupts everyone else as often as every few seconds with a terrible joke, a dead meme, or just random noise. The most entertaining thing though is watching everyone else getting annoyed and trying to tard wrangle Nuxtaku into shutting the hell up. The best episode is the one where he decides to just play Apex Legends while everyone else talks. For pretension, he has plenty of high school level philosophy takes. The best though is a weird fan theory he takes 20 minutes to explain which is predicated on him somehow thinking that Spain was on Britain's side during the Battle of Trafalgar.