I mean he single handedly pulled the future forward in two different industries so far. Just because he is not "well adjusted" on twitter doesn't mean he cannot get shit done.
Single-handedly is when Louis Slotin improved nuclear research safety for all time with the consequence of his failed screwdriver stunt.
What Tesla and SpaceX have done are enormous human undertakings. He did not single-handedly do it by any rational interpretation. The delusional self-confidence he used to get investors to pay for those undertakings is what's about to destroy Twitter.
I think it's obvious that Elon Musk didn't single handedly pull the future forward. He cannot do this without his employees, especially since we know SpaceX is actually mostly ran by the COO Gwyne Shotwell.