I agree with the OP. It is DEFINITELY time for him to move on.
He will soon find out that the grass is not always greener on the other side of the septic tank.
Nevertheless, the more elite members (especially Platinums) that leave the program, then there is that much greater opportunity for the 99.9% of us who are satisfied with Marriott Bonvoy to get upgrades. As a bonus, there will be a lot less drama here on this Board.
Best of luck....
Newman