Please have a glance on the game https://online-go.com/game/8073186. I don’t understand in which moment I’ve begun to win)))
If I look aside from a multitude of small mistakes in local fights (black could have killed the white group on the left, for example, but seeing the move to do that was beyond their abilities for the time being) I think you won around move 67.
They kept playing greedy moves and pushing and pushing even further and that introduced weaknesses into their wall… if they were more calm, they could have just secured the territory they already had and won the game.
Thank You for kind attention.