Should I tell my friends they're spoiled?
Why would you want to tell them that?
They are always asking others to do stuff for them and just act spoiled in general.
Generally it's good to be honest with your friends, and if this is an issue that is causing friction in your friendship, then by all means you should have a civil conversation with them about how you feel.
I'm going to tell them they're don't know anything and they should act less spoiled
While talking to them is an okay thing to do, your approach should probably be a bit less harsh. A calm and respectful conversation will give you better results than attacking their character.