There is no absolute answer to your question. Every layout can be exploited differently and no opponent is the same. Playing against a team that knows how to get theIR lanes down and across the field will prevent you from doing so.
Sometimes it's luck, sometimes it's predicting your opponents moves and actions correctly, sometimes it's both. In case you are moving forward to bunker someone, never start shooting before you actually see him/her. It's a mistake that a lot new players make and can ruin a potentially point winning move.
Also another mistake many players make is forgetting to "treewalk" when moving up, search it up if you don't do so.