On the drawing too loud, that could easily be an undiagnosed neurodivergent person with auditory sensitivity. People who are unaware of their neurodivergence can sometimes be the biggest assholes about it. I also have auditory sensitivity and it gets much worse and harder to deal with when I'm stressed and/or sleep deprived. In that state persistent irregular noises are much more likely to make me have a meltdown, especially if I can't escape. For someone who doesn't know what's happening and doesn't have healthy coping strategies that situation can easily become a meltdown directed at the most immediate irritant, in this case their child, which is really awful for the child. I was in that position a lot as a kid and it fucking sucks. I hated my parents. I'm not sure I can ever forgive them for how they treated me but I know now it wasn't malicious. Still, the damage was done.