If the countries of Europe are effectively "sovereign states" why did they give Britain such grief for seceding?

Because Britain was acting against everyone's best interests, including their own.

In the States a lot is being talked about Voter Fraud etc, I think Europe knows there was something just not right with the Votes here in Britain, Scotland voted against Brexit, Ireland (our part) voted against it, and I believe Wales did also 4 Sovereign States the vote went 3-1 the 1 claim the Victory 🤔

In the United States, the southern states tried to secede. The civil war resulted.

In such unions, there are economic agreements and monetary agreements. The South had to print their own money. Once they divorced themselves from the great manufacturing bases in the north, they began to experience agrarian poverty. Their allies became the enemies of the north.

As usual it all boils down to money. In this case the control of it.

Because they party alone. 😂

Boring question.. And idk what those words mean... All i know i think is that Britain is harry potter land

It sets a bad precedent.

Edit: stupid autocorrect!