All episodes were made available on 29 December 2023 for subscribers to the paid tier of Channel 4's streaming service;[14] this expanded to all users on 14 January 2024.

[20] The series is based on Rooke's comedy stage shows Good Grief, Happy Hour, and Love Letters.

"[23] Lucy Mangan writes in her four-star review for The Guardian; "[i]t is warm and funny, but with a melancholic undertow that fades in and out as the episode – and the series – goes on, but never disappears entirely", and that "[a]lthough it is gentler and less frenetic, Big Boys' combination of frankness, heart and wit – and the seriousness with which it treats young people and the problems they face – evokes the mighty Sex Education", but simultaneously, "Rooke makes it entirely its own thing – and one that can pierce your heart when you least expect it".

She touches upon the relationship between Jack and Danny in the series, saying [t]he growing friendship between the two young men, in a genre and world when such things are seldom showcased or made part of the cultural narrative, is genuinely uplifting", and also praises Katy Wix's "tremendous turn".

[25] In comments also for The Telegraph, Victoria Coren Mitchell wrote that "[d]epicted well enough, as they are here, surely any viewer can relate to those feelings of social awkwardness, wrongness, outsiderism and embarrassment which characterise teenage existence and – for many of us – the rest of our lives as well" - recalling how she felt at university - and that the show "triggers tears in the eyes from both comedy and poignancy, which is very hard to do in a first series", comparing Jack Rooke's writing and lines to that Victoria Wood may have written, and "[w]e can't know how accurate a portrayal this is of Jack Rooke's actual life, but we can know he has a wonderful comic touch".