Even if the whole world officially declares Russia is a piece of shit, nothing will change.

Besides in the very link you provide you can also see many maps excluding Slovenia while defining Central Europe. It all narrows down to whatever you want to base your facts on. You do you I don't care.

The map from wikipedia is also from an american source called factbook. I thought you wanted to dismiss non Europeans to present data for Europe.

If you have a better source please share

If you separate Europe east and west then yes. But many would like to categorize it as South Europe although culturally they are closer to other Balkan countries than Italy or Spain.

Never cite wikipedia to support your claims. Any Slovenian who thinks they're too cool to hang out with their Balkan bros can edit it. Here's a link to a book

https://open.lib.umn.edu/worldgeography/

Chapter 2.4 Eastern Europe shows the borders clearly including Slovenia

Nobody said Slovenia is east of Austria. It's east of Italy and that's what separates east and west Europe.

No, Balkans is a subdivision of Eastern Europe. If you wanna refer to Visegrad countries as Eastern Europe only, then you still cannot put Slovenia in that group. Anywhere in European continent that is East of Germany, Austria, Italy is Eastern Europe. You can divide the region into smaller groups and find differences for sure but you can't deny Balkans is Eastern Europe.

Nobody in the Balkans will admit they are in Balkans. Ref:

https://youtu.be/3rpEQmtkstM

Slovenia can deny it all they want but they are still a part of the balkans. All we can do is just be happy about this news and hope it can spread to other Balkan countries.