For instance, gatekeeping an OS behind newer phones to the point when the OS comes to older phones the next OS will be due to come out. Or even not having a clear release date and schedule with supported devices. Hell, even only supporting phones within the last 4 years. All of these things are behaviours which Samsung follow that Apple does not.
Tell me why a 2019 iPhone 11 is still receiving the newest updates but the S21 Ultra is not being supported or why One UI 8.5 has been available for the 26 Ultra for months now but not for other devices. Or tell me why when One UI 8.5 eventually releases it'll release on the S25 first and then SLOWLY trickle down to the older phones which could take months.
OneUI is so close to being perfect, however, lack of clear communication and care for older devices makes me fail to love OneUI.