If you ever played multiplayer with us in Settlers V, you probably saw differences to singleplayer gameplay.
Because of the for the MP(Multiplayer) created maps the speed of building up the settlement is usually much higher, so beginners most likely have problems to keep up. That can be meant as effort or as frustration.
You don't need to have inhuman fast reactions to be 'good' at Settlers, but instead you just need to know the game well enough. To speed up this process I'll try to pass you most of the informations I have.