G8 Stuck in twrp loop

This is the first time I've ever done this, but I just hated the UI on the Huawei G8 (laggy) and decided to try the xda way. PS: knowing that it's easier to help someone when they tell all the details, I am going to post all of it. So sorry for the long post.

First thing I did was try to update to unofficial marshmallow downloaded from here. But it didn't work saying installation failed ... Did some research and found out the device OS is from Iran (I'm from the middle east), so probably the reason why it didn't allow me to install an EU update.

What I did then was unlock bootloader by getting the unlock code from emui website. And then unlocking it from the adb terminal (adb.exe)

Then I loaded TWRP and did a backup.

I forgot to copy SuperSu to the SD card, and when TWRP asked me to root I accepted. So it got stuck on the Huawei logo while booting.

I then did a recovery from TWRP which worked perfectly

I should've just downloaded a new rom and flashed that , but I was like maybe it might allow me to install that update now the phone is unlocked so I tried installing it from the updater ->local update. And that's when the looping into recovery happened.

So I tried to do another recovery from my backup , but again it loaded into TWRP . Which I don't understand since I guess it should load the backed up System. Or is there something telling the device to reload the update from the SD card causing it to crash again ?

Thanks

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