Of those, only Russia and Byzantium represent EE somewhat.
It's all about PR really. Most of the EE countries were dominated by Russia, Germany, Austria, the Ottomans in the last two centuries. Meanwhile, studying world history developed and EE was left out without advocates in the process.
Want a classic example? Creasy's The Fifteen Decisive Battles of the World. Let's take the Battle of Tours. Any contemporary historian of modicum amount of skill and neutrality will tell you "the battle of Tours" was no more than a raid in force to plunder the rich monstery of St. Martin.
Now, let's take the third siege of Constantinople, which took place 14 years prior to the "battle of Tours". The land military forces engaged in this conflict were far greater than those at Tours, with the two greatest Mediterranian fleets on top of that. The siege was massively important, the greatest city of Greco-Roman and Christian civilization at the time was at stake. Bulgarian intervention on the side of the Byzantines was crucial for the victory of the Christians.
What most Western people know, however, is that the inconsequential engagement at Tours stopped the Muslims from overrunning Europe. That plays nicer to ego, doesn't it?
It's ok, really. All states have their myths of nationalistic pride. What's not ok is being in denial Western history is part glory myth. Eastern Europe is fully free for the first time in many centuries, and it's reckoning time for Western-centric and Russian-centric nationalistic myths.