I feel for you. I went through about the same of Unshackled, the Horde equivalent for Nazjatar.
And j got EXTREMELY lucky on Worldvein. I got it first map out.
I commend you in your patience. I have stopped trying for Mechagon and rarely go there now as I don’t want to go through that RNG again.
I only have rank 1 of Blood and Strife as I have not done competitive PvP since Wrath. And I doubt I will ever get cutting edge to see a chance at rank 4 from EP. At least this tier anyway.
Best of luck to you bud.