Because the Formula 1 teams are constantly fighting to make their cars as light as possible, every component is permanently poised on the limit of self-destruction.
Different circuits offer greater or lesser challenges to the various aspects of the car.
High curbs and a generally poor track surface will work to damage suspension wishbones and dampers. Ask the teams engineers for their opinions and some would vote one way, some the other. Both tracks feature ferociously punishing layouts. As far as Montreal is concerned, the headaches result from the low-speed chicane located midway along the fast, main straightaway, and the tight hairpins one at each end of the straight. They leave their braking until the last possible second before slamming the pedal, and dropping the speed of the car to a stately 40mph.