Upon inspection, the inside of the keyboard was very dusty and the switches felt awful. The infamous dirty alps effect. I had previously owned another keyboard which had black SKCM switches and they didn't feel nearly as bad despite the condition of that keyboard being FAR worse.
So from there on, I attempted to clean the switches and added the click mod by increasing the angle of the tactile leaf.
Spoiler: They still felt shit. But now stiffer and incredibly tactile. This probably wasn't my best idea, but seeing as it worked on my Dell AT102W, I though "why not?"
To remedy this, I tested two of my only lubes which I had on hand: silicone grease and WD40 silicone spray (sprayed in a small dish). Both were applied thinly on two separate switches with a cue tip. No major improvements there and the scratchiness still prevailed.
I'm now stuck between deciding if I should:
A. Get some better lube (like TriboSys 3203) and try it on all the switches. Maybe also decrease the angle of the tactile leaf.
B. Linearise the switches, maybe lube them and get stiffer springs.
C. Desolder the switches, buy some Matias switches and solder them on.
D. Ditch the project and not spend any more money on a shit feeling keyboard

Any help or suggestions would be greatly appreciated.
Oh. Also. The number 6 key's stem broke off when removing the keycaps--it seems the previous owner had broken it somehow and tried to superglue it back on. So if anyone has any spare num row 6 keycaps for an AEKII to spare, please DM me.