The reason for hanging the L2 or R2 button

I have since the release of the console this two DualShock 4 controller which I alternately examples. On average, about 8 hours a week. Right at the beginning I noticed that the rubber coating of the analog sticks triggers, have me here then ordered those caps Amazon and well.

A few days ago me but not always noticed that one of the two the L2 button fully to its original position back, I thought that possibly from the guide button has jumped and therefore "pinched", so I did the controller opens ,

In short, the axis of the button was just broken out of the guide but not easy, what was the reason for jamming. The entire key is molded from a single piece of cheap plastic in order to save costs, if I remember correctly was the axis of the PS3 controller nor of a metal pin.

Sorry, but Sony so nothing will. The controller's otherwise quite good but save at such places is botched.