Please get a passport, visit Europe, and then have an informed opinion.
I can't speak personally for the eastern or southern states but here in central europe things are quite peachy.
The central/west/northern parts of Europe are the most stable in the world, I doubt that will change soon, regardless of what happens elsewhere.
Come on over and have a look! I invite you to coffee and cake, and a stroll in my garden
Greetings from Frankfurt
Go figure.
The fact that there have no longer been wars between the participants?
After thousands of years of endless strife, wars & massacres.
Ask people from my great-parents generation (who lived throught WW2) if this is not a HUGE benefit...
The only 'win' I can think of of the top of my head was the UK referendum, which was 52/48 in favour of leaving. Polls taken now suggest that people are now mostly against leaving but the referendum result still stands.
Poland was one of the most pro-EU countries in the union, and it will be again. It has seen the benefits firsthand, regardless of a vocal minority of xenophobes.
Le Pen had big gains yes, and still lost because the country decided to vote tactically, together to stop a fascist getting any power. She lost.
Hungary I'll give you, because it has been hardcore right-wing for a long while and massively corrupt.
His policies and speeches bring definite reminders of nationalistic policies past, of using immigrants as refugees and scapegoats for everything wrong in a society, as well as appealing to traditionalist values, the "things were much better in the old days" rose-tinted glasses mentality.
It is a symptom of being stuck in the past, a wish to bring society back to the imagined "good old days", which never actually existed in the first place. There are also the obvious calls to maintaining traditions and cultural identity that is "under attack" and in many cases were actually imported from other cultures and assimilated over decades. It's the exact same story with every other nationalistic politic party, in every European country.