Lately it seems there's many and more than plenty threads about DF doing quite a "horrible" job, and while i have had my fair share of not so well going dungeons, there's just not enough proof in front of my eyes to be convinced this happens as much as it does, and i do doubt that those that get them more frequently simply "always" get them, we do tend to remember bad experiences more than good ones, as we tend to lash out at bad persons rather than praise good ones.
I didn't find the right solution from the Internet.