This is an extremely hyperbolic account. Yes, him calling a guy a "pedo" on Twitter during a back and forth spat was a mistake that reflected badly on Musk, but well within the realm of sane and forgivable behavior.
Musk has never said anything "transphobic", and the author's claim that he has speaks to the kind of totally intolerant speech-compliance she demands.
It speaks to someone too sensitive to tolerate views that deviate from those of a narrow ideological narrative, which explains why she 1. protects her tweets to not have to face criticism, 2. characterizes restoring free speech to Twitter as "wreaking havoc".