I think he gets like jokey annoyed at the messiness. He'll make little digs but they'll usually just laugh about it and Dianne has obviously made little to no effort to stop so she can't exactly be seriously worried about his reaction to the mess.in the second vlog he posted he refers to the old apartment as “back in London” so I think it’s safe to say they didn’t move into suburb nearby or anything. looks like he really did make the move to brighton as many of you suspect...
edit to add: my interest in joe’s videos kind of fell off around the time he got with dianne, so to regular watchers of his vlogs- is the annoyance at dianne’s messy habits a regular thing? I didn’t notice anything passive aggressive the way you would see in a Zalfie vlog, but just curious... I know finding big clumps of hair and having my headboard dyed red would definitely get under my skin after a while
It's been discussed before a while ago that Dianne might have ADHD and messiness and disorganisation is a big symptom of that. Getting angry or overly annoyed at habits like that, that are hard to control would just be mean imo.