Labeling Powell/the Fed as a psychopath simply because they're turning one of the very few if not only inflation control knobs they have seems extreme.
A psychopath would have done this randomly or at an illogical time (say by raising rates at the outset of the Great Recession). Just because you don't like the outcome of a decision doesn't make the decision maker a psychopath, more so when they agree that they wish there was a better way.