Hello everyone! I feel in debt with all of you, since a lot of your advises and tips helped me improve performance. SO, what I did, since I can't move my game to an SSD was to load the Virtual Memory on the SSD instead of HDD. After that, disabled all sound enhancements as said in another comment. The most important thing I did was to lower the game resolution to 1280x800 and it actually looks kinda good. And, guys, limit your FPS to something between 30-45, it will help. I couldn't even move without having stuttering, and when I did all this, I could kill my first 3 looters in battle, lol.
My specs:
i5-4570
RX570
8GB RAM
WIN10
I hope this helps, I know you may not like to limit your FPS, but you'll be able to have better performance that way.