My dog is being really pissy (sorry if it's long. Please help!)?

To put it simply, he's spoiled by the sound of it and voicing his displeasure when he does get in trouble or not what he wants. Most dogs don't like to be pushed. I've had a dog that was easy going unless someone pushed him, and then, he'd bark profusely and loudly at whoever pushed him. How would you like someone to push you. It sounds like he's spoiled and thinks he is the alpha. Personally, I'd say to train him. If you don't know how, then you need to go to obedience classes with him. He should learn down, stay, come, and so on where you wouldn't have to push him off of the couch which I don't understand. If he's allowed in the bed, then he will think that he should be allowed on all furniture.