I think that she has taken on an almost impossible role.
Theresa May was elected to office after David Cameron's resignation following the Brexit referendum.
Cameron expected to win the referendum and for the UK to remain in the EU. When the vote went against him he immediately resigned and left whoever followed to pick up the pieces.
No planning was done for Brexit since the government did not expect it to happen. The referendum also gave no clarity on what kind of Brexit was expected. The questions of whether we should stay in the single market and customs union, join EFTA, or have a third-country relationship with a free trade deal were all uncertain.
Theresa May was also left with a deeply divided Conservative party to manage as well as a deeply divided country (the referendum result was 51% v 49%).
But the worst problem is that she is surrounded by political opportunists who have left her to do the almost impossible task of negotiating with the EU, when the EU holds all the cards, and now that this work is over have immediately stepped in to stab her in the back proclaiming how much of a better job they would have done themselves, even though none of them have provided any useful ideas throughout the process.
I'm not a fan of Theresa May, or her policies or politics. However almost all of what you are seeing on Twitter today is just politicians being politicians. Posturing and pushing and playing the game of thrones. Many of them would be happy to leave the country with the utter chaos of a No Deal Brexit if it meant moving power their way.
It's all pretty sickening.