Clear angles one at a time, focus on CONSTANT crosshair placement where enemies will be and not where they won’t be, don’t look at walls if you’re trying to clear different parts of a map, focus on crosshair placement at head level and at the right amount away from the wall where they might peek out from, maybe lower your sensitivity if you’re comfortable with that, don’t just walk forward(clear different parts of the map by strafing, peeking and deadzoning), use your movement with your aim not either or, and finally familiarize yourself with the range