Most of the comments here reference the fact that her skill is self evident. He could easily have felt threatened by her technical skill, and the fact he couldn’t plainly see it as other commenters did adds credence to his own deficit of technical ability.
The fact that he maintained a sustained slander campaign when he ostensibly had other priorities implies he felt that ‘exposing’ her became important to him, again a trait of insecure, low status individuals.
> the negative impact of my tweets was amplified by the fact that I, a white, Western, male CEO of a key company in the Maker community
This guy was not low status by any definition.