i can't at people here turning it into something sinistre lmao. there is nothing wrong in being proud of your hard work and achievements
I think it's a very SM Entertainment thing... Super Junior's Heechul once said on a variety show (can't remember where the clip came from; Edit: Found the source.) that in SM Ent's culture, they are trained to believe they are the best. Especially after harsh internal competition to debut. So pride in themselves and the brand that the company created for them is a natural outflow of that kind of company culture.
I can see why many fans find that appealing, and pride in following "the best" or "the top" is a big part of the whole approach of marketing that SM Entertainment uses for their idols. It gets reflected in their fandoms as well... fans feel a vicarious sense of pride in following idols who proudly claim to belong to "the best groups". (Regardless of what the actual idols think, that is nonetheless how they are marketed to fans... and over time it becomes a self-perpetuating belief.)
I personally don't see much appeal in that, since I'm much more drawn to the opposite value of humility, but different strokes for different folks.
this is not true at all. quite literally, none of it.
i have followed Super Junior for approximately one decade and a half and i have quite literally never once seen a single member say such a thing. praising each other? sure, but praising themselves and using their name to brag? never. in the contrary they always go on about being lacking and needing to always improve and learn more.