I've had four Glocks now (G22, G23x2, & G26) and zero problems. Not saying they don't exist. I've heard the Gen 4's are having some kind of issue.
But to the people drinking the Haterade, I have to ask, what are you comparing the Glock to that has been MORE successful at the SAME PRICE POINT? I don't think there is any other mfr even close in it's class. Even the ones that have reached "Almost as Good" status, still aren't.
To get back on-topic, I would have to say that I refuse to believe that Glock returned a weapon to you that was faulty and potentially unsafe. If they say there's nothing wrong with it, then I'm inclined to believe them. I don't know what the solution is regarding your problem, but if you're confident it's not your shooting style, then I'd look at the ammunition. In the interim, maybe you should wear a face shield? Lol. Good luck with this one.