What is the problem with Garmin devices?

I am someone who likes to use a GPS device in my car. An external device like Garmin or TomTom.

Many, many, many years ago my dad got me a Garmin device and it worked great. I updated the maps and the SW for years. But at one point the device didn't start anymore, even though all the updates were installed successfully (as could be seen in Garmin Express). I contacted Garmin support and they told me that the device is no longer supported and they couldn't help me. I asked them whether they brick devices on purpose so that people buy news ones. I never got a reply to that question. Go figure.

Let's recap: I updated my device successfully and then it stopped working. The device was kind of old, but did its job very well. Until the successfully completed update bricked it.

Support was utterly unhelpful and I really liked the device, so I bought a newer model. I had been using it for many years and today another successful update bricked this one as well. It is stuck at bootup and only the Garmin logo can be seen.

I am completely puzzled by this. What is the problem with Garmin devices? Why are they bricked after installing an update that actually finished successfully? I am really starting to wonder, if Garmin is doing this on purpose. What's even more annoying is that support is utterly useless and not willing to help, even though I've been a loyal customer for over 15 years.

If updates brick a device, don't let people install the update. I could have used the device with an older map. Now I can't even use it at all.

Either way, it was the last Garmin device I ever bought.