Jay dog,
I had the same experience as you, skin wrecked by temporary loop ileostomy. I even developed a yeast infection in the area around the stoma. It all gets better after takedown. Until then, get yourself some ilex paste (which I wish I did) and find a good ileostomy nurse if you can. And count the days to takedown. Because it won't come soon enough, but when it does, all those issues are OVER.