Ottoman Empire extremely adhered to Jihad thought grounded by Islamic traits which can be right away portrayed as spreading Islam and battling against unbelievers. So in the meantime Europe was in mayhem because of wars between various kingdoms while the majority of the Sultan's were considering just battling with a certain and unforgiven devotion to spreading Islam toward the western world.
What's more, the military establishments were more effective than Europeans in light of the fact that for the most part warriors were brought up since their childhoods generally taken from their own families and changed over to Islam and brought to kick the bucket up in the administration of the Sultan.