Robert, it's exactly how they told me about 3 broken screws right after I bought it already. And yeah, I agree that everyone can handle it with tap and die toolset (one of these:
https://cozyhousetoday.com/best-tap-die-set-review/) but that's what I call unfair deal, so long story short it's all about principles and I've asked my lawyer for help in returning it back. My husband has went to Hawaii on business trip for 3 months, so he couldn't even help with it.