I don't really read episode 4 the same as many (no surprises there!) and didn't think the idea was to blame SG's character but to understand and sympathise.
I read it as focusing on them searching themselves for their own responsibilities and reason, the poignancy of the fact that the teenage girl daily becomes overshadowed by her absent brother. She did have agency though and it was her who said they shouldn't move away. I actually thought they were lovely to ehr really but the show focused (lightly) on her own trauma, poor thing.
The idea to me seemed to be they get up daily to try to have a nice , better, more normal day - mow the lawn, wear new top, have a Chinese, go to the pictures ( they never had the breakfast) but the trauma of what Jamie did is always below the surface - the van being vandalised was the inciting incident. Even in a DIY store they get recognised and trapped. Their lives were constant stress.
It was significant that it was dad's 50th - a milestone birthday and his life had amounted to being the dad of a child killer. His day escalated and was basically destroyed. Birthday not happy, cinema plans aborted, Chinese plans modified, pointless inane chit chat about his new top which was now worn just to not go out. The teddy bit was genuinely touching.
The programme showed how events like this can eat away at families and highlight their imperfections and flaws. But he parents were still married ,still loved each other. Yes, they were fairly traditional in gender roles - but lots of families are.
Honestly, I think most things were normal and that that was the point. That's why Jamie's descent was overlooked.
13/14 year olds out with mates late into the evening - mine never have, but to many parents this appears safe and normal (this seems a surprise to MN but it quite common- in fact on some threads you'd be called over protective if you didn't allow it). I live opposite a row of shops and there are often kids outside the chippy at that time just hanging around (and , yes I have seen them shouting at each other, fighting, drinking - and then they go home).
Teenagers spending the whole evening into the small hours on phone - also normal. On the c4 School Swap programme one girl said on Friday nights , she stopped looking at her phone around 5am. On school nights it was 1am.
Teenagers on dodgy websites and addicted to social media- also normal.
Year 9 boys making up stories about girls and being lairy in lessons and corridors - also normal (but not the day after a murder - not accurate or normal)
Dads trying to make their sons play football and be like them - also normal
Losing your temper when kids vandalise your van - pretty understandable. He felt like things were spiralling out of control. He had clearly once had a good relationship with neighbours. I think he was a fairly complex man, not one dimensional as that would be silly.
The rather overlooked conversation was the one about him being 'safe' in his room and their naivete around this and the idea (perhaps as a result of his father's abusiveness) that the dad was wary of telling Jamie off too much so left him too often to stay up - the 'what can you do?' line. They learned the hard way that they should have been more intrusive. They are going to spend the rest of their lives picking over things that they might have done or not done and that is a sad truth. Really, it was made up of a multitude of factors.
Jack Thorne really thinks this is all about the internet.
The one thing we all coudl learn from this - police bed times, no devices in rooms, no gaming or surfing at night alone. Conversations around social media.
It's easy to ask schools to teach about dangers, and schools can and do police phone use - what happens when kids go to the 'safety' of their homes is huge society wide problem. I actually wish the programme had pushed that a bit more vocal because it is honestly really common for kids form stable and ordinary homes to be up all night by themselves in their rooms , falling down all sorts off rabbit holes without the maturity to deal with it.