I'm not sure that's quite true. Kirsty definitely skipped being project manager this week in favour of setting Rhys up for a fall, but nobody has shirked as much as Tim. The classic example is passing the responsibility for doing the pitches off to Arjun in week 2. Arjun wasn't more confident and didn't have any more information, but was pressured into doing it nonetheless, even though they had previously agreed to share the pitches. Nobody else has done anything like that. The closest is Kirsty not putting herself forward for project manager, but that's avoiding taking the responsibility in the first place, rather than actively backing out on something you've previously agreed to.

That was definitely his weakest moment and it doesn't recommend him highly at all (although again I put it more down to panic and weakness than active strategy), but I can't think of many examples beyond that (and even then...why wasn't Rhys doing the pitches given that he's the champion public speaker and debater?). He avoided being Project Manager in episode 1, but so did every other candidate on the show. He stopped making the snack-packs in episode one to go and actively sell on the stall. He wisely wasn't Project Manager on task 2 because Hannah Cherry had more experience, but seemed to put in far more input to the task than anyone else did. He wisely wasn't Project Manager on Task 3 because both Kirsty and Rhys had more experience than him. He wasn't a sales-person on this task, probably because Kirsty is the team's one natural salesperson, and it would have been better for Rhys to be on the floor so he knew what was going on.

Add that in to the fact that he was clearly in charge of his sub-team in terms of negotiations with the chef over the cooler (which yes, he messed up badly), took charge of the camping product photo-shoot, and seemed more in control in the kitchen then Hannah Cherry did, I think he has been given and taken on far more to do than people give him credit for.

I don't think Arjun has shirked responsibility. He did the pitch in week two, and in week three he took on doing the calculations. In both cases, he could have been blamed if he'd screwed up (in fact, he didn't pitch very well, and was lucky the prodcuct was less bad than the other team's)

Maybe he should have given that as a reason instead of some guff about the wind then?

He gave it as a reason as well as some guff about the wind. It's in the episode - he said that he saw people looking at the stall, not being dealt with and went to talk to them rather than continuing with the snack packs.

Ok, I'd forgotten that. But he'd have been better not saying anything about the wind at all.

Anyway, although Jordan was IMO primarily to blame for the team's failure to make up any more packs, I would have expected Tim, having had an idea that turned out so well, to push for it to be continued, and to try and make sure as soon as possible that someone else took on the selling while he made up more packs.