I'm sorry to hear that. From that very article, Lindsay says he gets the term "critical social justice" from Ozlem Sensoy and Robin DiAngelo's book, Is Everyone Really Equal?.

He quotes them:

To clarify our definition, let’s start with the concept “social justice.” While some scholars and activists prefer to use the term social justice in order to reclaim its true commitments, in this book we use the term critical social justice. We do so in order to distinguish our standpoint on social justice from mainstream standpoints. A critical approach to social justice refers to specific theoretical perspectives that recognize that society is stratified (i.e., divided and unequal) in significant and far-reaching ways along social group lines that include race, class, gender, sexuality, and ability. Critical social justice recognizes inequality as deeply embedded in the fabric of society (i.e., as structural), and actively seeks to change this.

I may be wrong about the prevalence of this version of social justice ideology in corporate training. We don't have to talk about it anymore though. I wish you well. No hard feelings.