This site has a difficult-people tag. However, this is a site about Interpersonal Skills. I would guess that 50% of questions on this site are about someone being "difficult".
Let's remove difficult-people and use more specific tags instead.
Like what more specific tags?
difficult-people is useful. Also, I don't think it's being overused - currently there are 8 questions tagged with it, out of 236, which is about 3.39%, nowhere near 50%.
If you have good ideas for more specific tags, I guess that's something to think about, but just a general proposal to kill difficult-people isn't a great idea, in my opinion. I think it's fine the way it is.