The Brexiters had every chance to take control of the situation and chose not to. They all pulled out of the leadership contest.
They pulled out because they realised that leading the country through the Brexit process was a poisoned chalice and would put an end to their political ambitions for evermore.
And they were right.
Tbh, I'm not sure that anyone could have done much better. I agree that there should have been a cross-party group going through the options from an early stage, and working out what was achievable in parliament, then taking it from there, but I'm not convinced that Labour would have participated, the LDs and SNP want no part of any sort of Brexit, which leaves the DUP and Plaid Cymru.
The DUP had their input anyway, and got £1bn bung for doing so, so they're the real winners in this.
And if it wasn't for Gina Miller, the detail probably may not have had to go through parliament anyway.