I am getting so tired of seeing these. Why not try finding a way to beat them rather than complaining because you can't win.
Sages and Sorcerers have the weakest armour in the game, if our attacks and heals weren't strong we would useless. Yes we have a lot of control and powerful ranged attack but if we don't crush our opponents quickly we are the ones who get thrashed. That is just our play style.
Also this game is not just about game play, it's about roleplaying and story which I think you'll find is the main reason people roll these classes, not because they're easy.