Anybody notice the excess energy it takes to cook a TV dinner resistively makes it taste substantially better than the pinch-a-watt microwave? There are things the microwave does well and things it does poorly. Kinda like any cooking method. Real damn hard to make boiled egg with charcoal.
Cooking breaks down food. That's a third of why we do it. The other 2/3rds are it tastes better hot and it kills bacteria.
Why do frozen entrees fare poorly in the nuke? Because it burns the periphery in the time it takes to heat the core. Besides boiling water for tea, I use the m-w most on power 3 or 4. There are several things it does very well on high. Among which, scrambled eggs, meatloaf, and hamburger (in a browning skillet). It will even make fudge, but don't turn your back on it.
Packaged food m-w instructions are for speed and convenience, not flavor or nutrition. There simply is not a kitchen machine that can make up for, pardon the expression, ignorance.
Somehow I managed to eat half my life without a microwave. But having (the same) one since 1982 I would NOT want to give it up.