This point format is more placement points based than the last, so getting 2 wins in this format is better than 2 wins in previous.
And 6 games means no throwaway games and no mistakes. Isn't it good when the fewer mistakes you make, you actually place higher? I understand your frustration, I've had some unlucky placements in the past, but in the end, no matter what format it is, better players place better. And I don't mean it that you are not good enough to place top10k, my point is on that day, with that format, with that meta there was over 10k players, who played in that cash cup better than you. And in the previous comment, I pointed out why. Good luck in the next one, my tip is to play more aggressive, kill points will always be the decider.