If Theresa May was a true leader she would never have been bullied by the brexit brigade into abandoning her principles.
Admittedly she was a pretty lukewarm Remainer but she has never even yet said that if she had to vote today she would change her vote.
Because she does not believe in brexit, she has felt required to bend over backwards to out-brexit the brexiteers by flagging up these "red lines" which would put us in an even more impossible position.
If she hadn't got the guts to stand by her beliefs and say "OK I note the result of the referendum, but it was only advisory so lets try to go back to Brussells and negotiate a better deal for staying in", then at least she should have opted for a very "soft" brexit, reflecting the lack of support that any hard brexit really has.
By making herself a hostage to the small number of extremists in her party, she has shot herself in the foot.