Soft Bricked LG G3 D855, Please Help

I am not new to rooting and unlocking Androids. My LG G3's UI would randomly freeze where I had to reboot the device to have it working again. Today I decided to flash the vanilla unicorn rom in recovery. I downloaded the rom and copied it over to the phone but the copy process kept getting stuck at some point, that I always had to cancel it.

So I decided to wipe cache and data to just reinstall the official d855 CM13 rom I had earlier on the device's storage, the wipe got stuck for at least 20 mins. I got impatient and removed the battery trying to reboot into recovery, but I was stunned and stuck on the LG Splash screen logo, I kept trying to reboot into recovery but couldn't get past the LG splash screen.

I then decided to try rebooting into fastboot, I was able to boot into fastboot the normal way without any issues but every attempt at getting TWRP just wasn't yielding anything useful. The closest I've gotten to seeing TWRP since then was with the fastboot command

Code:

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fastboot boot recovery.img

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which reboots showing the TWRP splash screen image without actually showing TWRP, but I've noticed I can access adb while the screen is stuck on the TWRP splash screen image.

I can't do any sideload of the zips on my computer because TWRP just stays there stuck on the splash screen so I can't enable sideloading. I have spent hours with this and it has taken too much of my time, attempts at

Code:

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fastboot flash recovery recovery.img

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just returns with an error in cmd with FAILED (remote: flash write failure).

I can't figure out what to do anymore, I'm left with a phone that can't boot into the rom and recovery, only the fastboot and download mode works. I just need the phone to let me boot into recovery so I can flash the files I need to and have my phone back to its earlier state.

I'll really appreciate everyone's support, thanks!