Just like that, however, he was back on the bench. And he’s not happy about it. For the first time, however, he’s really voicing that displeasure rather than simply saying what the Bulls want to hear. ‘‘I’m definitely not happy about it,’’ Valentine said Saturday. ‘‘I’m a competitor. I want to play, I want to be productive, I want to help the team win. But that’s out of my control, so I’m not about to let it make [me] not happy every day.’’