I disagree.
What is the "deal" that he's supposed to negotiate? The biggest parts are tariffs, movement of people, and what EU regulations UK will stay in compliance with.
What incentive, right now, do the EU negotiators have to yield on ANY point, knowing that Boris is mandated to accept whatever deal he can get?
The trade parts of May’s deal was acceptable even to Rees Mogg.
The only dispute was over the Irish border