I'm at level 80 and I've played 150 days in a row but my experience points lead to absolutely nothing!!! They become LESS AND LESS and it takes me like 10 days just to level up.... This is ***!!!!
alosso has already explained the system. But my question is this: why does this upset you so?
At your level and tier there are plenty of very good club options available. In fact, at Level 80, you have some the best wedges (the Vokeys at Level 76,78, and 80) available to you. Additionally, the Level 70 putter is (most likely) the second best putter in the Pro Shop.
In any case, you really should consider dropping the hybrid and carry 3 wedges (56, 60, and 64).