One thing I have read over the years in this forum is users spend to much time playing with the Garmin Units.
They are not happy with the maps they have on them.
So they replace the maps on the units by deleting to many files and then brick the unit.
They buy used units that are setup in US and want to put Europe maps on them.
Not knowing what was wrong with the unit before they bought it.
The best is they formatted the internal memory because they did not remove the SD card.......
That I have read so many times here and in other forums.
I then question why they would even format the unit in the first place.
Were they stolen and the user tries to remove any info from the unit.

One thing I have always done is download my map updates that came with the unit.
Have not tried to put patched maps on any of the units.

If I need to go to the US and I have an EU unit I buy the USA maps I need.
Screwing up a unit just because you did not want to pay for a map you will need when going to a country you do not have a map for.

I have never ran into any problems with any of the Garmin units I own be it old ones from as far back as 2007 which still work.
To the new series of Garmin units I have in the last 3 or 4 years.

Maybe there are more break downs with newer models then in the past but I question what the user has been doing to the unit to cause problems in the first place.
Plus they still have a warranty on them then contact Garmin to get it fixed or replaced.

Reason most users do not know what they are doing in the first place.
You see it all over this forum no matter what GPS they have or Android app they are using.