Now, I believe that there is little more that I can do to save the planet other than kill myself. That applies to many environmentally friendly people today who still have to live and work in the context of 2017, and not in 1017.
Which is precisely why any environmental quest to reverse the effects of mankind will never work... we're all far too entitled to actually commit to the necessary.
As for the rest of your third paragraph, there's far more to consuming than plastic... gas, electricity and produce that you haven't made or grown being just three...
Having no appliances would be far more responsible than even so called 'A' rated... which incidentally only applies to the energy consumed in use and not of the energy or materials consumed in manufacture.
Short of becoming Trappist monks living in caves/cabins/treehouses, we're simply pretending.