Well, wing produces lift by accelerating the air downward. That's a result of third law of motion (principle of action and reaction). And it applies at each point along the wing—the lower the pressure, the higher the lift, but also the downward acceleration of the air flowing over the wing.
Now that only works to a certain point. If the surface curves too fast, the air won't be able to follow it any more due to inertia, will detach and the pocket underneath will fill with stagnant air at ambient pressure, eliminating the suction and the lift with it. That is stall.
Normal wing distributes the acceleration of the air along the chord. However, as the air follows your shape, it would accelerate downward a lot in the first part, then return up somewhat before the second hump and accelerate downward a lot again over the second hump.
Your wing needs higher curvature at the two humps to compensate for the concave part generating negative lift. Mainly the first hump is critical, because increasing angle of attack only increases the curvature near the leading edge (while flaps increase it further aft). So I would expect your wing to stall earlier.
I would also expect the wing to have higher form drag, because there would be more changes to the flow conditions and each such change means losing some energy to viscosity.
Also above compares wings with the same coefficient of lift. To achieve it, your wing would probably have to be thicker as it needs to compensate for the negative lift in the middle part. Which is another reason for having higher form drag, too.
No advantage in sight anywhere.