Does this rim tape need to be replaced?
One way to get tears around the valve stem is by not supporting the pump head and stem while you're pumping up the tire with a frame pump (the kind where you are pushing on the stem as you pump up the tire, like in the photo below).

Notice the way the person's left hand is holding the pump and the rim. The idea is to stabilize the head of the pump so that no stress is placed on the valve stem.