My Road to Revenge in the World of Titans

[Invincible + one or two female leads + yandere + ruthless + a few liberties with the source material + somewhat dark]

Xu Xiang'an transmigrated into the world of Attack on Titan.

He gained the power to return from death, and thought he could finally turn his life around.

But after facing the cruelty of reality, dying and returning countless times, and being betrayed by his teammates...

On his 152nd return, Xu Xiang'an gained the power of the Titans. From that moment on, his goal changed.

He would take revenge and kill everyone who had betrayed him, making them regret ever coming into this world.

Then he would change this cruel world and stand at its very pinnacle!