Star Wars is his brainchild. A half-formed, empty, vegetative brainchild. He conceived it, wrote it, and insisted on directing (the one of the six he didn't direct was by far the the best film of the lot).
The prequels were complete and utter garbage in every way. If any actual director afterward didn't think Natalie Portman could act, then that speaks to the colossal failure of directing by Lucas.
The real test will be if the Disney+Abrams films live up to the originals, but the prequels have probably cast their immutable shadow over the entire franchise.