So sorry to have to disagree with many of the comments; but she was objectively a truly terrible PM.
She had numerous failings, including not being willing to listen to others, not taking others into her confidence, trying to sneak her solution onto others, having a truly terrible negotiating style and being completely ineffective at negotiating, issuing nice sounding words and then completely failing to live up to her words (e.g. ask the residents of the Grenfell fire tragedy, many of who are still in 'temporary housing' or - at the Home Office, her deliberate instigation of a harsh, even vicious regime, - or the number of stabbing victims, in good part due to her massive cutbacks in the police while she was at the Home Office); some truly terrible appointments to the Cabinet (36 of whom have resigned - an all time record in such a short period), being out of touch with the true feelings of the country when she called a snap election etc. etc . . .and - above all - her complete failure to recognise her own failings.
She (together with Farage) have made this country a laughing stock - I have spent a bit of time abroad (including 6 weeks in Australia - a country friendly to the UK through long historical links) and they think that we have all gone mad!!
I don't mean to be harsh, but I think that the above comments (whether you personally agree or not) are reasonable comments and justified by the facts. Personal sympathy is OK - but a PM must be judged by her record - and her's is not great!