I have had the opposite experience with Synology, as I have a DS1621XS which had 6 x Samsung EVO 4TB drives in it and they all failed at once.
They aren't even NAS rated drives - so I'm with Synology on that one - why should they support something that's not even designed for that usage?
(Especially as your presumably running them in RAID so likely will exacerbate any issues)
Also presumably you installed them all at the same time? As with most things RAID, better to hedge your bets and buy from different suppliers to try and get different batches of drives, and with SSDs especially, stagger their install, so that drives have slightly different endurance so don't all fail at the same time purely on write endurance grounds