1/ A challenge in parsing Brexit news is that businesses are facing overlapping types of challenges that can be difficult to separate.

The key questions are:
1⃣ Given the model of Brexit chosen, could this have been prevented, and by whom?
2⃣ Can it get better?

2/ To put those another way:

"If you knew everything you needed to know and did everything right, is your existing business and delivery model still viable and competitive?"

The answer to that question determines if for you the problem is Brexit, or how Brexit was delivered.

3/ Some of the challenges at borders could have been prevented while still having the exact same model of Brexit (No Single Market, No Customs Union, but an FTA).

That they're appearing is an implementation failure and you can fully support Brexit but still be pissed about them.

4/ Examples include:

1) Government guidance and IT systems being ready earlier and/or easier to navigate;

2) More support for businesses, and more affordable bespoke help;

3) More time to prepare and better government communication about what preparation actually requires.

5/ This thread you've all seen from Daniel Lambert the wine merchant (primarily) deals with problems in this category.

There's no policy reason he can't export his product, but the procedures are a nightmare to navigate and he's badly under-supported.