Wanting to be left alone doesn't work and will always create malice, especially if there are nation spanning problems at large. It's an either you're with us or you're against us situation.
4 applies to every humanoid species in DA. Dwarves, Elves. Qunari all are greedy, all want more than they have, all see the other races below them, none of this is leased by humans.
There is no true 'you're with us or against us' situation. In the minds of those involved in whatever conflict, maybe, but from an objective view? No. There are shades of grey everywhere. There is no true black and white situation. And really, not getting involved in a conflict that has nothing to do with you is often better than choosing sides, especially when you don't know the whole story. If you don't want to take sides and one side goes after you, they're either paranoid that you're prepping to side with the opposing side, or you're going to jump in when both sides are weakened, thus dragging you into the conflict anyway. Besides, paranoia is another part of human nature. It keeps us alive, yes, but it also can make us take unnecessary actions.
Yes, every race can be subject to those traits, but that doesn't mean that it is consistent throughout most of their people. The qunari (the race themselves, not the followers of the Qun) are either Tal-Vashoth (those who reject the Qun), Qunari (those who follow the Qun), or Vashoth (those who grew up without the Qun). Since most qunari grew up learning the Qun, the majority of their race is not greedy. What we've seen of them does not represent their people as a whole. As for the Tal-Vashoth, it varies. And the Vashoth? Again, it varies.
The dwarves are down to just 2 cities out of their original 12. They merely want to reclaim what they lost to the darkspawn. Their race is backed into a corner. Financially, they're fine. In terms of population? They're on the verge of extinction when compared to the most more numerous humans. If they wanted to conquer the surface, I could understand you're reason. But all they want is to reclaim what was lost.
The elves are either crammed into cities, surrounded by humans who treat them like trash, or are travelling vagrants, not welcome anywhere. The city elves simply want to be treated as being equal to humans. The Dalish want to reclaim all the culture that was lost. There are no elven nobles. They are considered to be the bottom rung of human society. I'd go as far as to say that they are considered to be even lower than that.
Humans, however, are the most wide-spread and most numerous out of all the races in Thedas. They have the power everywhere except Par Vollen and they still want more. The definition of greed is wanting more than is needed. Do the qunari, dwarves, or elves want as much as the humans do, and/or have it? No. The humans have more land, more power, more money, and more people than every other race in Thedas combined, yet they still want more.
As for the arrogance, I'll give you that. Then again, most people like to believe that they are better at certain things than others. Does that carry over to other races? Possibly.
For aggression, humans have every other race beat. Do you see the dwarves declaring war on surfacers? No.
The Qunari are mostly a peaceful people from the way Tallis describes them in MotA.
The Dalish are somewhat aggressive towards humans, but understandably so, considering what's happened in the past. They are mostly wary of humans, anyway.
City elves? It really depends. On the whole, they aren't aggressive. There are some who tend to be aggressive, sure, but on the whole? No.