TBH I was reading between the lines that there’s more to this than meets the eye.
Firstly, it’s often the case that people who push themselves for success have some kind of childhood trauma (not necessarily with a big T, could be parents that fall way less than ideal but not necessarily criminally abusive).
Clearly at least one member of his Mum’s family is unhinged as her sister posting publicly on Insta is batshit crazy. His DM then posting the passive aggressive/attention seeking “U okay hun?” quote meme on her own Insta is also clearly batshit.
His DM offering (pushing?) to craft table settings for the kind of wedding they will be having is batshit.
Also the reason they didn’t make it to the dress shopping is batshit - the train service from Uttoxeter goes nowhere near Huntingdon, it’s not even operated by the same company. So I highly doubt it was impacted by the incident there. Basically I suspect some drama llama tactics of how DM couldn’t possibly set foot on a train because she might be in danger when she clearly wasn’t going to be.
I’m sensing fucked up family dynamics here - and that the new relationship has been the breathing space he’s needed to realise how fucked up and he’s started to push back and put boundaries in. Or perhaps a mix of that and his own issues, I’m sure he’s not perfect but spider senses say it’s not a “poor them for being working class” story it’s being made out to be.