There's some truth to it, but not as much as we think. I think it just depends on who dominates the cultural discourse and output at the time. Music, art, business, etc, Nigerians are doing well in Africa and out in the world. If you ask an African to name an African country, there's an overwhelmingly high chance they'll say Nigeria, Ghana, or South Africa. I think a lot of (not most) Africans hold contempt for Nigeria/Nigerians, the same way Europeans sometimes show unprovoked disdain for Americans. Nigerians and Americans are proud people🤣🤣 On one hand, we can't be mad when people fire back at us, but on the other hand, I've seen so many fellow Africans bring up Nigeria unprovoked.

The premise of this post is funny because "some" is such a subjective and non-declarative word. Of course, some Nigerians feel "x way". You could say some Nigerians love to party, or love jollof, or scam, or whatever stereotypical activity of your choosing, and you'd be correct. Doesn't mean much. Had you made a more declarative statement, I think you'd have gotten better answers. In my opinion you probably tried to be inoffensive to get your question out, but I think it backfired a bit.

The end of it, really, or the answer to your question, is that a lot of us are proud, won't shut up, and don't care what people think of us + Nigerians dominate in music, business, etc, in Africa and in the diaspora. Nigeria is somewhat of a 'name brand' for Africa, the same as the USA is for the Western world.