Also, from my understanding, the burnout did not seem to stem from the actual work but more from interpersonal relations and disagreements. I am certain that is not uncommon
Sometimes it looks like people are burning out because of extreme workloads. In these situations, I've always asked "why is the workload so extreme to begin with?" This gets you to the real source of stress.
“You're just worms in the worst part of the apple that's rotten You squirm and you turn from the right, still plottin All slimy cause you stay grimy, petty crimey”
While some have no alternative others enjoy that kind of game and are part of the problem. Best stay away from such jobs, and undermine corporate at every turn.