The problem is, however, not in a “word,” but in “layers of meaning,” behind it.
People like to complicate things, with words like (bitch! monster! suck! etc). Retool it.
“Keep it simple” – that’s actually the happiness!
That’s actually the reason some people are easy to live with. Relationship wise or even business wise, it makes sense.
The real context (the other side of coin), though, is complicated?