I finally solved the issue, miraculously, nothing was working so I just left the phone to continuing formatting for an hour so, came back, and it seemed to have done it, I installed Custom ROM, and it booted up normally, I'm not sure what triggered the phone to accept the system mount, but I am sure as hell happy it did. I was worried I was going to have a bricked device on my hands.
Hold strong, just allow the phone to continue doing what it needs to do I guess. Leave TWRP in all STOCK settings, I tried to modify multiple settings based on Devs saying to get a faster formatting to enable RM-F but I have no clue why and what didn't work.
Anyhow, problem resolved!
On another note, I would never use the recommended method from Droid_<3er as they would completely brick your phone unless you're specifically in the situation listed in that thread. As you would put your phone into a state where you lose both access to Recovery and ROM access, rendering your phone to a piece of plastic and metal. But it's definitely worth mentioning, I just had to do some research on the method cause I had the same thinking as well.