But logically, taking in all the possibilities which can go wrong, why is it that the only ones with problems are the ones coming from China?
We have also looked up those from Australia, they seem to have a range in their arsenal, including PET kegs. They were released in 2017 so they have stood the test of time and the problems don't seem to occur in their range.
The downside is they are not available here.
On your first point, the answer is that the vast vast majority of pressure vessels sold in Europe are Kegland's ones, so it stands to reason that you'll see more of their failures.
There is a shop in the UK that currently stocks the Keg King ones.