The pissing contest is fun for a while but gets boring, eventually.
To me you don't seem to know when you are beaten, by someone else who really has spent a lot more time than you on the subject.
What do you think stops liquefaction of hydrogen at room temperature? What physical limitation prevents it? Phase diagrams give what is known, but they don't tell you what is unknown. Go ahead and see if you can find the physical reason for why hydrogen has not been liquified at room temperature like butane or propane.
You won't find any because there is none.
Its just something never funded, because almost all hydrogen research to date is funded by fossil fuel companies and interested parties.
Liquefacton of it will kill fossil fuels, the instant it happens. No research project wants that, because none are funded to actually kill the profits being made from fossil fuels. That would be insane, funding a project to kill your own profits.
Watch that space, as soon as they are forced to move on to a new world, room temperature liquid hydrogen will be routine in no time at all.
This is my opinion. You can take it as expert or not. A fossil fuel funded scientist claiming, and even believing they know all there is to know about hydrogen, even writing reference books on hydrogen, would probably say I know nothing, because I was never paid for any of the research I've done on it. So I am not a professional scientist.
But my money, if I had any to bet, would be on seeing room temperature liquid hydrogen in no time at all.