I don't know what the subject should be

[Springdew]

Dp leans over me on the sofa to plug in laptop, he accidentally drops end of lead which donks me right on bridge of nose, surprises me and hurts a bit. I said ouch, he said loudly and abruptly 'shhhh'

Sorry did not mean to create so soon! I'm annoyed at this and said surely it's normal in these circumstances to say sorry rather than shhh? So then I get a long drawn out sooooorryy which clearly is insincere and sarcastic.

This happened In front of teen dd but pretty much went unnoticed, and I first of all ignored, but then it escalated and all of a sudden I'm at fault and I'm the one having to leave the room to save drama and my sanity

He was being an arse. His first reaction was to silence you, followed by belittling you, followed by some sort of escalation. Not on.

Is this part of a pattern of behaviour?

Jesus. That's not normal. Normal is surprise, alarm, apologies and a kiss better.