I've been using Garmin products a long time, and there are a laundry list of software and firmware issues that go years without fixes. You're burying your head in the sand if you don't think there are and have been many Garmin devices with headlining features that just didn't work.
Off the top of my head, major features not working:
Livetrack just straight up did not work for years.
Many users of the Edge 810 found that it often just wouldn't display turn by turn directions. For me it would randomly work maybe 10% of the time
Fenix 5 battery life issues are super common
Took them years to figure out stable Bluetooth connections to phones