I find both cases equally annoying although the later case (non-excellence) borders with ridicule. Also confidence IMHO is a totally different thing and doesn'

I find both cases equally annoying although the later case (non-excellence) borders with ridicule. Also confidence IMHO is a totally different thing and doesn't manifest itself the same way arrogance does. For example saying: "My team is really good" displays confidence in your team, saying "We can beat the crap out of every other team easily" is arrogant, even if it's true.