I did, formatted cache dalvik, data, and even system I tried.
It worked after more than 20 tries flashing https://www.mediafire.com/file/czeaic3pivgsckc/Tutorial_Mi9_Root_+_PureHackers.zip/file
The one called Prevent+Boot+Loop.zip
I have TWRP working, and I try to install like 6 different roms, they seem to install ok, but after reboot. It doesn't
It always comes to TWRP again.
Using 3.3.1-46-cepheus