That's not how to debate, provide feats or don't.
Provide feats? No. The burden of proof is on you, you are the one making a claim, it is up to you to prove it. "why would they use an inferior metal to create Zod's ship?" Who knows? Is it more durable than the World Engine? Who knows? But it's not the World Engine nor was it the ship that flew through multiple buildings like the OP claimed.
No your reasoning is faulty. So far Kryptonian metal/metals have all proven to be superior to earth's. They body armor couldn't be more than an inch thick yet completely shrugs off 30mm and missiles. Their smaller ships(that are housed inside the black zero) bulldoze A-10 warthogs like tissue paper yet you believe the Black Zero is weak.
That's all cute, but it doesn't make the OP any more wrong than it already is. I am merely stating the facts.
That's why I gave you another example of their ancient ships still being too durable. So unless you can prove Kryptonian metal out of all the feats they accumulated is inferior based on an inferior feat, then you're just reaching.
You're the one reaching here. Being ancient doesn't mean less or more durable. All I am saying is the OP is based on falsehoods, which it is.
And THAT was a black hole? The Phantom Zone is a black hole now? lolwow!