Yes you can criticise about the Chair, having no knowledge about how chairs are made.Guess what, I can criticise a chair without building one myself.
Your creator is a really sh*t designer.
If your god exists, it is incompetent.
It is very likely therefore that there is no designer.
You can criticise about skyscrapers how they are made.
You can criticise Jet Engines about "what hell of a noise they make"?
You can criticise about any thing and every thing in the world...
But if you are unable to make any thing better than what they are made, your criticism has no value.
To have a "bad quality product" in the market, when better quality products are available is exempt from this list.
The question is about the idea and the way it is to be done and how reliable it is.
To compare any man made gadget or design against what is created by God is sheer madness and every one knows it.