Why have I a theory of Mars' ancient destruction?

Because: Everywhere the camera looks, it sees nothing but broken rocks and sand and gravel, and there's no bedrock that isn't fractured. Why?

Because: The planet was hit by a meteoroid of between 100 and 200 Km in diameter which struck it near its equator and punctured its crust, which means
it would then enter its molten core, creating an unbelievably huge explosion as
that frozen body from space hit the molten core material inside Mars.

That meteoroid from deep space was likely covered in ice, and (for example) water turning to superheated steam increases in volume by a factor of 1200 or so. Mars was probably blown up like a balloon for a brief time, during which it
lost most of its hard surfaces of its outer shell or skin, exposing its inner core to the sudden cooling of space. I'm assuming it had land masses and oceans like
Earth, and those got launched into space from the blast. Following that, the remnants of the core reformed into its existing globular shape prior to solidifying from the drop in temperature.

So we've got basically the core of a formerly earth-like planet, now composed of mostly broken and fractured rocks with some visible evidence of ancient geological formations suggestive of a much different past prior to that disaster.

If you're looking for the land masses missing from Mars, try the Asteroid Belt, where it too is mostly sand, gravel, and broken rocks. If you're looking for the
former oceans of Mars, try the periodic comets flying by, at least one of which recently exhibited evidence of sodium in its gaseous tail, suggesting perhaps 'frozen salt water'.

And I would love to have someone prove I'm 'full of shit'. So please do!