my Gen4 G19 has been rock solid reliable for 8,000 rounds now, even with my handloads and a bunch of $6 Korean magazines I bought for range use. It's one of the most accurate and soft shooting pistols I own. I haven't even bothered to change out the cheap plastic sights.
I hope your problems are something as minor and easily fixable as a bad magazine follower because these really are great pistols.
I was a skeptic at first, but I have been convinced over the past year.