Todays Turkey is many times different than it was in history. Recently Russia under-estimated Turkey until they realised they were messing with the wrong kid.
In the past, it was Turkey who fought Russia in their backyard while fighting many other enemies simultaneously even while being outnumbered. In history, Turkey/Ottomans relied on the qualitative ability of its army while Russia relied on their overwhelming manpower. This time Turkey has both Manpower and Quality to rely upon, something which terrifies all its enemies.
In the past, it was Turkey who fought Russia in their backyard while fighting many other enemies simultaneously even while being outnumbered. In history, Turkey/Ottomans relied on the qualitative ability of its army while Russia relied on their overwhelming manpower. This time Turkey has both Manpower and Quality to rely upon, something which terrifies all its enemies.