Councils/areas that received EU funding that are now feeling the pinch
The sheer number of job losses
Reduced movement
None of these seem to be dependent on being a member of the EU, only dependent on a competent government making good financial and budgetary choices and good treaties.
To me these are problems which have been only revealed by brexit, not caused by it.
I’d say they’re both. A competent government would ensure that we plug any gaps, and they would have already agreed trade deals with major nations that surpass what we already had with the EU in terms of free trade or movement. While I wouldn’t want to see the UK become the new Mexico of the US, I can see lots of British people happily performing seasonal and manual work in the US, and open markets for students to study in both countries.
I’d strongly disagree when it comes to the top two points. They’re just not possible when Britain is such a tiny country. We shot ourselves in the foot when we left, because we had zero leverage against the EU.