That's because you screwed up somewhere along the process. Mesh wasn't oxidized well, coil was too tight or too loose, or the wick was touching something it shouldn't have been.
Everytime I have made a genesis style coil for iAtty or Odysseus (It really isn't that hard to do) the flavor is akin to sucking on the exhaust pipe of a 1950's buick with a blown head gasket. But we all have our likes and dislikes.