Off the top of my head:

• Councils/areas that received EU funding that are now feeling the pinch, especially in areas like Wales.

• The sheer number of job losses (see the Digby Jones Index for examples).

• Reduced movement, and an inability to hire in some industries, with zero flexibility of movement elsewhere. While I'm all for trade deals with the US and Australia, they almost definitely won't be allowing British citizens an easier time to move.

Lots of these don't particularly affect people in the South East, and in many places that were both Labour and Brexit strongholds, poverty and underfunding are the norm anyway, so it's not like things getting "worse" are noticeable.

There was a great article a while back called "the sociology of Brexit". Sadly, I can't find it any more, but it explained the above far better than I could, and indicated why many that voted to leave the EU wouldn't change their mind, regardless of what happens.