Well, you're more tolerant with THEOL's mix than I would be, but it's more a stylistic, subjective matter altogether. But you're absolutely right about that record being squashed to death. Look at the audio "graphs" (sorry, I don't know how you call these in English...) for I wanna kill you... :
https://lh3.googleusercontent.com/zx...=w2304-h694-no
This song's structure rests on a gradual build up, with more and more instruments and layers kicking in. Can you see any of that? Nope, the beginning is just as loud as the end, which sounds like a fucking mess. Now compare it to Minute of Decay :
https://lh3.googleusercontent.com/gL...=w2304-h591-no
Space, peaks, details, and who would say that that bass is not loud and clear?
Wight Spider, as you've pointed out, is another fine example of a botched mastering, the quiet parts are way too loud, which gives no space for the loud ones, which sound super mushy. Don't even get me started on Pretty As...and Armageddon. The first is a two-minute buzzing drone and the other is a blob. I've compared the graphs with that of its cousin The Beautiful People and it's striking how it's louder, while sounding so much weaker.