Well he's always proving the haters wrong. I'm just waiting for the MTF tards excuse when he wins another slam, with the wind already been blamed, I guess they'll have to blame the sun next time.
He is certainly proving the haters wrong, but not because of them. He is simply doing his job, playing as good tennis as he can, peaking for the important events. Trying harder to win an ATP250 for the sake of proving someone wrong is not something I expect of him, that's not going to be his motivation, but he can certainly win it anyway.