Like JohnBurke said, not adding adequate amount of rudder in flight during SE is student pilot learning, not airline qualification learning, and that's an intolerable mistake. I mean it was not the entire duration of flight. More like somewhere around 2-3 mins in cruise. I caught it as we were entering the phase of the approach "Whoops!! My mistake!" and corrected it. But it was too late. LCA wrote it down. And i'm the complete idiot, now that even JohnBurke here is leading the criticisms here.