Ahh well it said "bazooka" so naturally thought it would send a missile flying until hitting a surface. -Apparently it only works on the crosshair :) nevermind.
Like i said, it did feel odd that it was not possible. So all good
Did you try to HOLD the bazooka button after aiming? it increases the power and radius of the explosion. Maybe you are not seeing the destruction because the explosion is very tiny if you just tap the button. dont tap, hold! :)