It's still 12 megabytes which is wild for a model that just has solid colors for textures imo

Thanks for the feedback!

I've updated the textures to lower the file size.

Downloaded just so I could crack it open and figure out why the hell it's 60 megabytes.

DXT5 should only be used on textures with alpha. Use DXT1 for compression without the alpha channel.
You shouldn't have a 4k texture for a single, solid color.
You don't need a 2k texture for solid black or for solid gray.

I know textures have compression but it's not like PNG where a solid color will be low filesize.
A DXT1 texture filled with random colors is the same filesize as a DXT1 texture that's pure black.

why is it so caked