Peculiar Brick Situation

This is a bit of a cross-post with GBATemp, but I figured I'd increase my chances of finding an answer by posting here. :)

So here's my situation. A couple years ago, I bricked my Wii very badly. I tried many different things, but in the end, I formatted my system, set it aside, and just purchased a new Wii (and left it untouched and unmodded).

As a hobby project, I decided that I want to try and bring it back from the last Bootmii backup I did after the brick, perhaps at least one more time. Admittedly I didn't give enough information to solve anything two years ago, so I'm set to change that (I apologize if it's perhaps too much information!)

Alright. So, my problem is that the system will not boot into the system menu. I see the Health & Safety screen, but the 'Press A Button' prompt does not show up. This happened immediately following the removal of Priiloader.

Sorta. When I tried to remove Priiloader, it froze on the 'no password found', which is normal I know, but it never rebooted. Another detail is that I had the disc channel movable hack on, and moved it; THEN disabled my hacks, and uninstalled (kinda, as mentioned) Priiloader. Right now, that's the state the console is in. Priiloader is technically removed, my softmods are all there (Bootmii is obviously present, Homebrew Channel, etc), I just cannot advance past the Health & Safety screen. The Bluetooth module is fine, as my controller pairs fine.

What I tried and tried and tried again: reinstalling the system menu (I was at Waninkoko's 4.3 [a bad, bad choice]), but each and every time it freezes at either part 2/9, content #151 (if installing through a WAD manager) or just freezing while attempting it through DOP-Mii or MMM. Reinstalling Priiloader does not work, and makes it black screen. Trying to uninstall it again makes it fully blackscreen.

Another thing I tried recently was StartPatch, just to see a few things. The Priiloader-esque hacks had no effect; skipping health and safety just has the moving, fading Wii icons (usually when you load the system menu). Finally, when I use NandClean, it freezes when trying to remove the Priiloader settings file.

It would make my year if somebody could help me. I'm getting a Wii U and all of my old WW and VC games are still lost (but I knew that was a necessary evil when buying a new one/reformatting) and it would be awesome to transfer them. This incident didn't necessarily turn me off from homebrew, but I haven't pirated any software since (I'm up to 40 physical Wii games!!!!). But yeah, any help would be much appreciated, so thanks so much guys. :)

Since the original wording of this post, I did several things. I used nandBinCheck and found a few issues that perplex me. I will post it in the spoiler below.