My friends and DH would crack up at Gaston, can him out on anything that sounded off, give him a cheeky dig back and then ask him about why he does the work he does, What's rewarding about it, What's difficult etc
Working in that industry I know he must be really resilient but also really empathetic and caring you can't do what he does without that, he will be working with people at absolute rock bottom, from adults who can't even read to people desperate for a job when they get out and willing to do any training to achieve that. Amy doesn't give two hoots about that, she cares he got his bum out. What he does isn't particularly well paid and maybe he does that live if thing in the side occasionally to earn some extra cash, it is what it is.
Kieran should've walked away as soon as he knew about the pmdd , I get it it's an illness but if it writes her off and makes her an emotional wreck for two weeks a month like she says I don't think that's a relationship I would want forever either.