From the Telegraph, quoting an unnamed minister

Ministers in Theresa May's Cabinet want her gone by July so a new leader can conduct the next phase of Brexit negotiations, according to a Telegraph report.

May only has the support of two ministers in her Cabinet, according to a minister.

"Members of the Cabinet have privately discussed whether they should tell her at the end of this week that her time is up, after what is expected to be a series of disastrous votes in Parliament," the report says.

I feel for her because she simply tried to do what people voted for. Her political epitaph will be defined by her likely Brexit failure but the decision to call a snap election is what truly hobbled her.