That's a fair point. Under Cameron the Tories actually introduced some progressive policies, same sex marriage for instance.
I think, with hindsight, not even the Tory voters could deny that May's campaign was the worst by a PM in living memory. The manifesto was dreadful, there were too many u turns to count as it suddenly dawned on her that her strategy to be the even nastier party to attract the UKIP vote, whilst having a modicum of success, was alienating core Tory support in droves. She also underestimated Corbyn's campaigning ability despite watching him win the Labour Party leadership massively not once but twice.
Her latest mistake is getting into bed with the DUP. Cameron would never have done it and some old school One nation Tories like Clarke and Soubry will be holding their noses pretty hard when the go into the division lobbies with them. The stench may become too much fairly quickly.