Ironically, a lot of black metal is purposefully designed to be repellant to many. It’s their odd way of proving how “kvlt” they are - you know, because nobody listens to them (because few can stomach it!). In all fairness, Black Metal was the last of the metal genres I got into and from the same reasons you mentioned. But as with any genre, once I got into it, my tastes broadened. For me, it was a lonely time in my life, and the atmosphere of the music was often my own attitude at the time, it made for wondrous background music/noise since much of it was blast beats, shrieks, and static guitars. These days, I enjoy the style for what it is, but totally get why some people can’t stand it. I still have a tough time listening to some albums or bands who purposely make it such low quality that it’s tough to make anything out. But overall, I like most of the distinct sounds in black metal ranging from minimalist nature type stuff to pure speed and blast beats, to the orchestral arrangements, and to the experimental stuff. It’s all got its place.
Anyway, I treat my musical experiences rather scientifically. The reason why I have been listening to entire genres in alphabetical order has been to expand my knowledge and listen to stuff I haven’t heard before or on albums I rarely listen to, and in context of different bands. I find it really makes the differences and similarities of a style stand out, and makes me appreciate the style more as a whole. I’ve done it with thrash already, now black metal. Unsure what my next one will be. But I like to push my musical tastes and purposefully try new genres/bands that I have not liked in the past. Usually, after a few years, I find that I can at least appreciate most stuff, even if it’s not my favorite.