Yeah, that style is definitely not for everyone - there are lots of genres of metal and that's probably one of the harshest. I can certainly make some other recommendations you might find less appalling if you're interested, but I posted the topic on this one for a couple of reasons, notably because the lyrics can be at least tangentially related to Doom, which is not an extremely common theme.
My primary reason, of course, is to raise awareness of the band among those who might be interested in that genre. I don't generally listen to metal in that style, but something about the instrumentals, the vocal range and talent(whether you necessarily appreciate the style or not) of the vocalist, and the theme of the lyrics appealed to me.
I suppose I could offer a disclaimer up front, however =P
Edit: Also, very amusing(and if I'm being honest, not entirely inaccurate) descriptions of the vocals. "Lol" is probably very overused, but it's quite literal in this case, so thank you for that.