Because you have never worked for a large business. It is almost impossible to build anything anywhere, there are massive amounts of regulations if you do get started, interventions from multiple levels of government, it is genuinely mad. Look at mortgages, you have the government telling private banks to bail out mortgage-holders...do you think this would happen in Czechia? Just think about is happening: bank executives were summoned to No.10, they were told they were going to have to lose billions of pounds a year to pay for people's mortgages, they accepted this completely...is this normal?
...what? Stop for a second and think about what you are saying. Do you believe that one of the largest export markets for the EU was suddenly shut down overnight?
The rules with VAT are unrelated to Brexit, and were largely due to the staggering levels of VAT fraud occurring with imports from China. If you are sending things to relatives, you do not pay VAT...that isn't what it is for.
Baffling. I don't even know what to say at this point. You don't understand how any of this stuff works, why rules were change, these points should be obviously wrong to you with even the slightest application of logic.
Okay, you claim your weird points...look at the results of any public company that trades with Europe. You have companies that run cross-border meat processing, something that was supposed to be impossible after Brexit...none reported any impact (because they prepared their documents, and this was something that most of these companies were already doing because...surprise, surprise...the EU does not encompass the whole world, and they traded in and outside of the EU already).