His appeal IS that he's a 20 year old, who lives with mom and dad and doesn't have a job, along with the zoomer humor. A lot of conservative/right wing zoomers and guys in there 20s relate with him on these things. Also, the fact that there is not a lot of popular, young right wing talking heads, especially none that talk about some of the stuff Nick talks about. They are all either old men who have been doing it for 20-40 years or just young people who espouse word for word talking points from the Republican Party.
Nick being the somewhat "figure head" of the young nationalist right should show how desperate and dire the need for strong leadership is in this sphere. They'll latch onto a podcaster/live streamer who acts more like a comedian than a political figure, who hangs out with catboys and druggies and constantly delegitimizes the "movement" with jokes. Anytime he does something good, like getting people to ask Charlie Kirk and the Con Inc. tough questions that they don't have an answer for, he immediately does something retarded to negate any kind of actual influence it might have had.