The work obviously wasn't complete, and he could've had a hand in crafting a Brexit deal which would've been acceptable for the pro-Brexit crowd. Instead he ditched because he knew there was no plan made in advance and the entire process of negotiating a deal was going to be a grand clusterfuck. He's just flying by the seat of his pants, which would be fine if the British people weren't the ones who are going to have to pay the price for it.
He didn't ditch anything, the official campaign had no power. It moved onto government to implement the decision. He got a job in government as foreign secretary before resignging. The remainer PM surrounded herself by more remainers to ensure after 3 long years we still hadn't left. If you go into a negotiation with people who don't want to leave then yeah you genuinely end up with a big clusterfuck. Thankfully if he's serious we'll finally have someone negotiating who actually WANTS to leave the EU.
First you were mad he's probably going to be PM and handling brexit and then you're saying he didn't have a hand in handling brexit as a negative. You can't have it both ways.