Hey, I'll take some of that action. If happiness is "good," then why are other states "bad?" Sometimes angry people get things done. Sad people can make us think about what's wrong around us. And so on. Sure, happy people can be productive (they can also be shiftless), but it's a transitory, subjective, and fragile state; same with other emotional states. What if your happiness is built on another's misery, for that matter?
You're reading too much into my statement. Independant of all other things, such as why a person is happy, it's good for people to be happy. If God is omnipotent, He is capable of making all people all happy all the time. This would be a good thing. If He was omnibenevolent, He would anything He could do that was a good thing. Therefore, if He is both omnipotent and omnibenevolent, the only reason why everybody isn't happy all the time would be because He has done some other, more good thing.
The fact that there are people who are unhappy, therefore, disproves an omnipotent omibenevolent God, because any such being would eliminate all unhappiness in the world, because that would be a benevolent thing to do.
A popular response, of course, is that there must be unhappiness so that there can be happiness - there must be bad in order for there to be good. This is selling omnipotence short. Omnipotence means that, for any question of the form "Can an omnipotent being do such-and-such?", the answer is "Yes", no matter what "such-and-such" is.
God could create an object that He could not move, and then He could move it anyways. Because he's all-powerful. He can create good without evil, light without darkness, hot without cold, and anything else he damn well pleases, because he's omnipotent. Things like "reality" and "logic" are no limitations to an omnipotent being, because an omnipotent being
defines reality and logic.
An omnipotent god could eliminate the existance of evil and badness. An omnibenevolent god would. Evil and badness exist. Therefore, there are no beings who are both omnipotent and omnibenevolent.
necessary byproduct
This denies omnipotence.