I have much fonder memories of GoldSRC maps so Source maps don't really affect me in this manner. The last time I had anything close to the feeling of dread was more of a small existential crisis.
The map
Carbaseus was a major hit on the TWHL HLDM server waaay back in the day. If I recall we had a 16 player server and when it was full it was an absolute blast. For the next few weeks, it was THE map we wanted to play. Then, back in 2012, it wound up being chosen for Map of the Month as nobody had voted for any map released on that particular month. In order to get the footage for the review, we had to play a few rounds. This time however, there were only four of us.
For the most part, the map was deathly silent. Given the scale of the thing and the sparse number of players, battles were infrequent and over quickly. It was sombre, like we were watching HLDM slowly fade away.
Running around in that map now, it's eery. From the chaotic, multi-sided skirmishes from 16 years ago, to the occasional quick shoot out in 2012's review, to the sheer silence of 2020. It almost feels as though you are surrounded by the ghosts of TWHL's former members who have since moved on to other things.