One toxic atmosphere is the economics, which many have pointed out already. Ministry is dependent on congregational stewardship. Congregations are being squeezed by lack of income growth in the middle class. The people are taking on big debts to become ministers are going to be among the first to notice what a risky proposition it is.
Ministers, in other words, are evaluated constantly by people who are judging them on the most vague, personal, and undefinable standards. The RSCC and the MFC start the process of vague personality evaluations (the question in my day was whether we had "ministerial presence") and then hand the work of making these judgments off to search committees, committees on ministry, and governing boards of congregations. For many on those bodies, the evaluation is not much more than whether they "like" us, or remind us of people they don't like.
The canaries in the coal mines of our seminaries are telling us that this is crazy-making. It's making them crazy with anxiety and paranoia. And it's not just the problem of the formation process.