The last month has shown that Theresa May, sadly, just doesn't have what it takes to do the job. The election was the old story about the tortoise and the hare. Way out in front, she simply lazed around, refusing to take part in debates and counting on her massive lead in the polls. Even worse, she brought out a "death tax" in her manifesto that would have claimed from an elderly person's estate all the home health care costs for the previous three years, which would have wiped out the estate of anyone with dementia. This frightened off not only the elderly, but also the adult generation who would have been the beneficiaries of the confiscated estate. All done "out of the blue" with apparently no consultation with her colleagues. 
This indicates that her decision to call an election was not a calculated bluff from a position of strength, but was an attempt to silence criticisms that she felt too weak to deal with. 
It will not end well.