Huh? In fact, double Huh?"When I ran 4e D&D for about 7 years straight, the PCs encountered many Evil creatures. They befriended and allied with some (Duergar), they bargained with some (Hags), they fought some until they received and accepted surrenders and promises of repentance (Goblins), etc. All the Evil alignment does is tell me that these people aren't very nice and might be pretty ruthless when upset."
If that's all you get out of alignment, it's not working right. The reason for that is that they removed the aspect of alignment that helped you differentiate the types of evil beings.
4e D&D has two sorts of evil alignment: Evil and Chaotic Evil. Among gods, this differentiates between being ruthless and probably also domineering with a tendency to cruelty (Bane, Vecna, Torog, Zehir, Tiamat, Asmodeus) and being an enemy of creation because either aligned with the Abyss (Lolth, Tharizdun) or wantonly destructive (Gruumsh). Among other creatures, being Evil has much the same meaning as for gods, while being Chaotic Evil tends to mean either wantonly destructive, much like Gruumsh (this is Orcs, most Ogres and Trolls, some Giants), or demonic or Abyssal or otherwise aligned with the metaphysical forces of destructive chaos (eg Gnolls, Demons, Slaads, some other Elementals, etc).
But knowing that a person is ruthless, or domineering, or even wantonly destructive, doesn't tell me what they will do if someone approaches them for a chat, or offers to sell them something, or even asks for a favour. I wouldn't expect it to. I don't look to alignment to tell me a creature's motivations or actions; as an aspect of personality all it does it set some general parameters around where their moral boundaries are, and how self-aggrandising they are likely to be.