HN has had plenty of pro-Brexit comments too and your sentiments have their counterparts in "why is HN overrun with Brexiteers" complaints, etc. - this is standard. The truth is that the distribution here isn't so different from the population at large. If you control for education levels it likely tracks it closely.

(International distribution is the real wild card, but that's more hidden from view, since everyone here posts in English and the English of non-native speakers is mostly astonishingly good.)

In my experience with chatting to people who were pro-Brexit, a lot of those people were especially enjoying the benefits of the EU but hadn't even realised it (eg living in communities neglected by the UK government who had received EU funding for regeneration).

I am honestly curious what were the downsides for you which have been now resolved.