punishingly

adv

1. So as to punish.
2. In a way that is tiring or exhausting.

   “punishingly hot weather”

   “Bill Clinton was elected on an untenable premise: that it is the job of the President to manage the economy. Yes, that is what we have come to expect of Presidents; but this expectation, the author argues, is punishingly at variance with anything any President can credibly deliver[.]”