I've only caught part of two or three episodes, but it does feel to me like the 'set up to fail' thing is something of a theme too often - giving them challenges where they clearly don't have enough time, for example. And (again, bearing in mind I've only seen about probably 7 or 8 challenges), not enough actual baking.
Being set up to fail pisses me off in The Apprentice sometimes (when they are trying to claim the show is any real indication of serious business acumen, at least), but at least there it feels like the candidates are gobshites and worthy of being laughed at. In Bake Off I don't find failure entertaining in the same way, and it feels unfair that the bakers aren't allowed to show their best.