I apologize for the sudden disappearance but since I last posted I was busy with midterms and studies. Now I can confirm the problem is memory related as I tried switching the RAM position, the PC failed to boot entirely.
I first tried installing Void (for no particular reason other than it has a RAM installer) then on a reboot I got the same initramfs unpacking failed however a different error followed the colon.
I then tried installing Debian, on a cold reboot again same initramfs unpacking failed but this time it gave out “broken padding” or something like that.
So I got back to EndeavourOS in the end and decided to hell with shutting down my PC, I’ll just suspend it and reboot on demand. Gonna live with this till the RAM stick ceases to function completely but so far everything is going fine with this no-shutting down strategy.
In the end, thanks to each and everyone of you for your help.