No bad luck, simply not good enough. Its not only about the old Djoker. Worn out Nadal had no business to win two slams on just one leg, and retiring without being beaten in a Wim semi. Somehow, this generation of 26-28 is spent now. They all are not upcoming talents by now, but grown players at their peak time in their assumed zenith. Med is consistent, but loses a lot of finals from winning positions or winnable finals. Somehow he lacks a forecourt game, to get more offensive firepower. And on grass, his return standing position, miles behind the baseline, hampers his chances there. Zed is the most talented of the group with the most weapons, but he cannot pace himself well, and loses a lot of energy in early rounds. He also is a headcase, always depending on and arguing with his own people, instead of making own free decisions. Tsitsipas seems to be already over the hill. Ruud is a better journeyman, he mkes the best of it to his credit, and hangs in, but i never saw him winning decisevely on a technical level against inferior opposition. Thiem has lost his mojo after his injury, very sad sign. Shapo and Felix AA never fulfilled their potential. Tafoe has only sporadic moments, mainly in Laver Cup and USO. The next generation, Alcaraz and Sinner have one big advantage. They are not afraid of winning, if they see a chance, they go in and use it.