Her heart just isn't in it to be tough enough when she really has to be.
On top of that, if the EU likes the deal May has negotiated, doesn't that, on the face of it, tell us that it's a bad deal for the UK.
I saw Farage on FOX discussing the deal this morning. He claimed the deal is so one-sided that Britain doesn't even regain full control over immigration, and that "leaving" can't occur without EU approval. And, for the privilege of being abused by the EU, they have to pay a multi-billion dollar "exit fee!"