There are some **** strange people on here who think that parts should not be designed to work within normal riding extremes.
You are wrong again sorry.
The kit on that bike is not designed to take that amount of abuse and saying "normal British weather/riding conditions" makes no difference.
The stantions will be scrathed to f@ck and back, the rear mech only stayed on by a wing and a prayer, the chainrings will have worn down to ninja stars after an hour or so of grinding, the BB will be stuck solid and I would EXPECT all of that.
That's not a manufacturing/design fault it's a common sense FAIL.