but does lead poisoning correlate with marked low emotional intelligence?
Yes, strongly. Lead exposure, especially in childhood, is known to lower IQ and also decrease empathy.
The other things you mentioned are definitely major factors as well, but yeah all that lead fucked the older generations brains.
And then the gf decides she wants to try a new flavor, buys her “normal” nic strength, and fills her vape up with it before anon has a chance to dilute it.