I understand why Aatrox keeps getting pushed back and why he was abused for so long.
It's all in the lore.
Aatrox killed off Tryandemere's tribe or village I forget which.
Tryandemere is the Co-Founder's creation "Marc Merrill"
Tryandemere hates Aatrox
Tryandemere = Marc Merrill
Marc hates Aatrox.
Finally I have solved it.
P.S. Not sure if this was the right board so let me know if not.