I had to disconnect my system from the internet to get it to finish.
Yes, you disconnect from the www while installing the OS, when you come across the OOBE screen, you do this;
View: https://www.youtube.com/shorts/_GuFH9KdHC0
I don't know how to get drivers through commands
You will need a donor system/laptop, download all drivers that are the latest version pertaining to your platform, store them on a pen drive. Once you've finished installing the OS in offline mode, install all drivers in an elevated command, i.e, Right click installer>Run as Administrator.
^ you don't let the OS download and install drivers it thinks is right for your platform, that's what usually causes instability issues.
corsair 750x psu.
2x wd black 2tb name ssd
2x Samsung 910 evo sad 2tb
You're advised to disconnect all drives except the one you intend to install the OS on, so the OS doesn't create system partitions on other drives. Has happened to many across the years.
Speaking of OS, did you recreate the installer to rule out a corruption?