people's character also changes over time, and everyone's work is built on other people's (of course usually people try to make sure those people are credited correctly)

he is more of an extremely driven and singularly lucky workaholic asshole with sufficient capacity to cram a lot of technical details (or drugs) into his head, which impressed and motivated technical staff (and investors), who then morphed into this Nazi creep as he got more populare he simply began to ignore negative feedback more and more (and obviously got addicted to the far-right echochamber)