My DP needs his 8 hours sleep so he will go to bed between 9 or 10, and expect me to follow suit. He also had this tendency to fall asleep within 3 minutes so if I'm 15 min late and make a bit of a noise (I am a bit clumsy) he will wake up and go off at me for waking him up. It really bothers me because I see no need for a foul mood and I can't help it when I trip.
Last night I went to bed just ahead of him at 10 PM and brought my laptop to book my work hours as we need to book them before midnight the next day and I had forgotten before and didn't want to sit downstairs in the cold. It only takes a few minutes. I know he doesn't like it when I work in bed and I haven't done it for the last 5 years except for 5 min tasks maybe max. once a month but I thought I'd be done before he got in. So he was very quick in the bathroom and came to bed and immediately complained about my laptop, being in a horrible mood, before I could even tell him I just needed a couple of minutes. As I hate being angrily spoken to for literally nothing, we had an argument that lasted for the whole of my work task (literally 2 min) and much longer.
He excused his foul mood by "being angry at himself for not going to bed earlier" and "being in a constant state of annoyance at me" for some other shortcomings but didn't really ease off. I find that really unfair as it has nothing to do with the issue at hand which is that he got angry at me for nothing. And I just hate his foul mood which pops up so many times and so unexpectedly.
AIBU for getting upset at his foul mood?