Broken Home button cable

Hi, recently i have been repairing the screen on my iPhone 7, and i am onto the second screen because the first one i snapped the touch id cable on the screen itself ( near where it connects to the phone ) and i recived my second screen today ( from the same supplier ) and have done the same thing again, in almost the same spot, it happens when the screen is fully assembled and being installed onto the phone and im trying to clip the screen back in, my question is, is it low quality screens Or is it just my fault that im snapping them? Im also having trouble getting the screen to sit in properly at the top? Can anyone help? Thanks

Photos off the damage.