I think the best thing about being into the music you’re linking is that the landscape is very sparse. When you get the sounds, you’re going to be able to get the levels, “Easy”. But with any sub music you have to figure out the right sub, level, eq, etc. You could even try finding sub samples and starting there, if you haven’t already.
I will say, writing sub elements that’s specifically time with kicks and/or snares, staggered even so slightly ‘ms’ wise definitely help. But they don’t represent the whole mix, like some typical bass elements.
Keep at it my dude, you can get there. at that bottom end, you’re just making some really kick ass drums, is the way i usually look at it. However, you need some context…I usually have to go to my car to really get my bass issues, settled.
I’ve also written some sub bass stuff(like played with keys) at higher octaves, to get better tonal values for the bassline, only to pitch them down afterwards. Since it’s difficult to perceive issues on the low end.