We're not saying the map isn't fun for half an hour. At night. And with the lights off so there are no reflections on the screen... But it's just not a good map.
The flashlight in HL2 only goes about 20 meters which makes the long view distances in dm_runoff very problematic. mp_flashlight isn't even on by default and causes framerates to drop drastically. Modifying an existing map nullifies the originality of the map, no matter how many "extreme" or "dark" thingies are added.
What I really don't understand is why you don't put all your knowledge and enthusiasm in your own, original projects. There's this map in your profile dm_moroes (
http://www.snarkpit.net/maps.php?map=2629 ). It looks pretty good! No, it looks excellent. Why don't you try finishing that one up or start working on a new one? There are
so many "fun", half-an-hour-of-oddness maps out there and so little good, original ones. It just hurts to see so much work put in trashy see-and-forget maps while you could have spent the time on creating something new and interesting.
And please try to not use so many caps, callsigns and repeated letters. It's annoying to read.