The latest survey from YouGov shows a remarkable swing in the ratings, with Mr Corbyn surging from a terrible minus 42 in late April to being equally liked and disliked now.
Meanwhile Mrs May has gone from being plus 10 in April, to minus 5 at the end of May, to slumping to a dismal minus 34 in the wake of the disastrous election.
That makes her as about as unpopular as Mr Corbyn was in November last year, when there were calls for him to quit or lead his party to electoral disaster.