You had it sent back without shooting it?
You pushed on the shaft and it popped out?
Sorry you think you had problems. I've only had to use CZ USA for warranty repairs one time and they were prompt and good and solved my issues and had it back to me in just over a week.
Will I buy more CZ's? Hell yes. I've bought nothing but CZ's in the last few years after working my way through the Glock, XDM and M&P pistols. Thirteen or fourteen in the last 4 or 5 years. New and used. Front night sight "died" on my P01 Urban Gray, my only need of warranty work in all those pistols.
Every company makes some bad pieces, sooner or later.
I used hear people complain about the wiring issues in the TPI Z28's years ago. My old 86 IROC got 186,000 miles on it and was 24 years old before the computer croaked in it. My first engine harness/wiring issue. I guess I just get lucky most of the time.