Question about Creality CR-10S Pro

Firmware is sh31sse, as well as part of the mechanic : z-sensor can't be adjusted exactly. pusher first (without mechanical change) broke the glued bed, then really went into the alu bed and destroyed it completely (made a ~1mm deep trench into the alu bed). I also had to remove the USB cable many times or the machine would not start. During the second pressure test, a part fell open and broke against the pressed part (which was also broken).