I agree that PSA is probably more of a gamble (although I feel like they are putting out less crap since they ditched their PTAC line), but I guess I’ve gotten lucky with them.
I have 6 PSA ARs (8" 300BLK SBR, 10.5" 5.56 AR pistol, 10" PSA 9mm AR pistol, a PA-10 in .308, and two 16" PSA middys), and I’ve put many thousands of rounds through them over the years, including multiple classes, and I have yet to have one fail. One of the 16" 5.56 middys has over 11k rounds on it with the original BCG (gas rings replaced once around the 5k mark).
I hear about issues, but I personally haven’t seen any with my PSA guns. The BCGs have all been properly staked as well as the castle nuts on the lowers, and mine just haven’t had any issues. I do clean and re lube them every 500-1,000 rounds, so maybe that helps. And for reference, I also have a Colt 6920, a BCM middy, and a Daniel Defense, and I think the Colt Trooper is probably one of the best “bang for the buck” deals out right now.
But from what I’ve personally seen with my sample size of 6 PSA guns, they have been awesome for the prices and I trust them completely.