The lack of consideration and self-centredness makes me want to fling a chair through a window

A window.
If I can put my hat on, it seems to me (you made me realise it), the GF is not helping in this. I don't know they/them, but I have exited a LTR and I know do it it right, and they should be helping them move? I mean... unless Sio is a crazy axe murderer. Or just evil. And, on the available evidence.....