I think this is quite Kafkaesque for the decidedly imperfect Adam and Caspar. Nobody is listening to either of them. More so Adam yday, but it was Caspar's turn last time. They've been honest, to a fault, granted, and are being battered for it.
Everyone's had their fun marvelling at Adam's lack of self awareness, presentation and boorishness but what is he supposed to do or say substantively differently? I don't mean 'be nicer', obviously it would be better if people handled things with grace. It isn't a crime not to find someone not attractive and he can't force it to happen. Why ask him the same thing over and over again, create inflammatory hypothetical situations and break his balls for it? At least they're both sticking to one clear version of the truth (except the honeymoon sex blip. That was shitty but but adam has made clear that was a one off plus Polly knew his feelings and decided to engage).
They should leave next time, they're definitely outstaying their welcome jf this is set in stone, but they're allowed to give it a few weeks to try and are apparently pressured to do so. Whilst here, what are they supposed to do substantively differently if they don't find their partners attractive and one is for a weird and very understandable reason?