That is just TERRIBLE RNG mate, but I can tell you one thing usually after such severe bad luck your next kena / skoria/ malubeth/ bloodspawn or whatever will be a super rare trait.
I have got the worst luck with bloodspawn, well fitted, prosperous all day, 1 sturdy.
But Malubeth? I drop divines all the time
Wait... What...? 8 runs and no helmet has you worried, and feeling concerned? I had to do VWGT 280+ times for my first Molag Kena helmet (which dropped in medium and well-fitted). 8 runs is nothing my boy. Lol.
By the way, if you want to experience TRULY horrible RNG? Go and do VMA in hopes of obtaining an inferno staff in the final chest. Better yet, a sharpened inferno staff. Lol. I know people who are in deep over 300 runs, and have not received 1. In fact, on the topic of staves in VMA — it took me 100+ runs for my first staff (sharpened restoration) to appear in the final chest of VMA.