Unless you have a credible source for your "microwaves destroy nutrients more than other cooking methods", I'd disagree strongly with you.
Stopping psuedosciencific rumors in their tracks. :)
Boiling in water seems to be one of the worst methods, which makes sense because the water can easily leach all of the nutrients[1].
Everyone does agree the best way is simply to steam them.
[1]http://www.associatedcontent.com/article/250016/how_to_cook_...
A recent study conducted in the U.K. showed boiling vegetables that are members of the cruciferous family, including cabbage, broccoli, and brussel sprouts, significantly reduces their anticancer properties.
And MW specifically
If you choose to microwave your vegetables, use as little water and as short a cooking time as possible to minimize loss of vitamins.