I've had good reliability with recent production Federal Automatch, Field and Range, and Armscor. That's shooting a Glock 44 and anything weak will cause a FTE.

Walmart has experts who figure out what it costs to make something, and they order ammo by the millions of rounds, so they can be ruthless when it comes to squeezing their price to the minimum. Want quality? You have to pay for that. Much of the customer base doesn't want to. A couple of duds per box is fine for them.