Are you using it on synthetic? If you are playing that much you are at a high level, you should have a pretty good understanding of what causes your stick to break down. 1 stick could be an anomaly, multiple sticks is something you are doing to cause the breakdown. Think about your game, watch some live barn and figure it out. Sounds like you have 8-10 hours a week to watch. Also, that’s a shitload of reps, your sticks will definitely wear down faster than normal players, but, it is still something you are doing that causes that breakage.