Our expert says:
Well, it's hard to figure out what's going on from a distance, especially as you don't seem to even know whether or not he has some illness which stopped him from working. Then you say ALL the men in his family are like this, easy to anger and not working, which is really curious. If your young brother was similar, contact the doc who saw him to ask what the problem was, as some problems run in families.
he sounds as though he may be depressed or anxious or both, and can't take the extra stress of squabbling kids.
All the locks may be a snsible security precaution, or maybe he overdoes it a bit. Suggest he gets duplicates made of the important keys, for someone else, like your mother, to keep for him, in case one gets lost.
one can just trynto persuade him to get professional assessment and help. Compulsory assessment and treatment is only available when someone is seriously considered a danger to himself and/or others, and that would need to be discussed with your doctor.
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