Flanderisation is a little different -- generally applied to fictional characters, its when a single trait overrides every other aspect of your personality. Ned Flanders on the Simpsons is the inspiration for the term: a character initially created as a foil and mirror for Homer Simpson (kind, calm, and collected where Homer is typically brash, emotional, and chaotic) became a one-note character defined by his faith.

I guess you could kind of apply it to Musk in that he seems to revel in being something of a jerk, but (in the view of someone who's been very skeptical of Musk for a while) it's not an all-consuming thing.