poor impulse control and a lack of long-term thinking and an inability to take others’ feelings into account

And what is stopping you from just saying that, rather than using a pithy pejorative with a side order of pop psychology? It’s not just brevity. On some level you must want to express disdain for his behaviour.

I (seriously) do not see this as any different to “he hurt a few people’s fee-fees”. That guy chose those words to convey his disdain for the people Linus hurt.