The BIGGEST problem with clean energy

I've been in the energy industry for 25 years, and sit on the board for a large renewable energy company and it's clear to me that A) we embrace Nuclear or we're toast and B) no amount of storage fixes the very diluted and inefficient solar/wind approach.  They just don't work on a global scale.  Hydrogen takes more energy to make than is produced, or you're cracking methane so that's not 'Green' to start with.  Hydro lift is subject to evaporation / drought / massive capital costs.  Compressed air takes $8 to get $1 back and is outrageously inefficient.  Batteries are not practical from a cost / materials stand point.  Lots and lots of serious technical challenges ahead for us Humans.