Halkbank is a good proof of that bringing world-class players in a team doesn't result in a world-class team🤦
It reminds me of Eczacibasi (W) a few years ago (2016-17 maybe?). They have all star players on every position, but did not win any important champion in Turkey league that season (except WCC before season). I still remembered a regular match of Eczacibasi vs Vakifbank. They led 2:0, and 20:10 in set 3, but unbelievably lost to Vakif at 2:3. Since then, Eczacibasi lost the momentum.