On my "SAS: Rogue Heroes" rewatch & upon second viewing, I think my biggest issue is its tone; the raw potential is there for it to be truly great but this continual insistence on keeping the mood light & "laddy" kind of prevents the scenes from playing out as they arguably should, within episodes.
For instance, even the way in which it's shot is disconnected, lacking intimacy; typically you'd go for handheld, close up shots of the actor's faces when capturing a really emotional story beat - to ground the audience firmly in that moment & their performance, with no external distractions surrounding their character's expression - but here, the camera remains noticeably distanced, even in what are meant to be intense sequences capturing what are genuine flashes of inconsolable grief.
Of course, I get that's to maintain thematic consistency & the juvenility of the atmosphere it's attempting to create (reflecting how these men are unable to convey / deal with emotions in a healthy manner) so logically, the creative decision makes sense (because they are also distant & lacking in emotional intelligence - to be able to effectively communicate their thoughts etc. In a meaningful manner) but the resultant inability to connect's damaging because it hinders the audience's ability to invest themselves in the development of these stilted individuals, since they're unwilling to open up.
That may be intentional - to reinforce the purpose of the narrative & the message it's intending to send - but it has consequential disadvantages, as evidenced in installments like this one.