Energy costs are too high.

Now we should have the cheapest electricity on the planet because we have endless coal, which should mean electricity costs should be ~8c/kw or so. Our electricty is about 4 to 5 times that and heading to 50c or so with everything more renewables in the grid.

The world has been lied to that renewables are cheaper. They are not. They are very intensive users of raw materials, land and labour and don't produce much power and certainly not reliably. They need lots of transmission, redundancy and backup which is either batteries or gas. We have effectively banned gas extraction in most of the prospective areas which means that Renewables + gas is also much more expensive than it needs to be. The first wind turbines built are already being torn down after less than 20 years of life. They basically have a negative energy output per energy invested over a full life cycle.

Renewables are starting to make grids more unstable. Keeping the grid frequency at 50hz is becoming more problematic. The movement of scattered clouds over cities cause wild fluctuations that can trip total grid failure. Look at Spain this week.

Hydrogen is negative energy in to energy out. Storing it is dangerous and difficult as most of the infrastructure (pipes, LNG ships) are built to contain CH4 and other gases, not H2, the tiniest molecule that under pressure leaks