I disagree with this. Her deal is only this bad because of May’s own red lines. She could have had a much better deal if she had made some sensible concessions.
She could have. But any deal with softer red lines (or no red lines) would have looked conspicuously like a worse, no different deal than the one we currently enjoy. Not that her deal looks good of course.
If, as a government, you want to leave then the current WA is as good as it's ever going to get, and as good as it needs to be.
If, as a government, you want to remain then withdraw A50.