That’s only in the short term. It doesn’t touch on natures capacity to bounce back over millions of years. We could kill off entire branches and trunks of the tree of life, crash every ecosystem on the planet, and life would still bounce back eventually. Molds would grow on the debris, some would find the slurry of radioactive plastics a tasty treat, and eventually it would rebuild.

We could ruin the planet in the “short” term, but we probably cannot extinguish life, even if we tried our hardest.

There isn't infinite time left in "eventually" - maybe a billion years, out of 4.5 billion passed so far. A billion years is about how long it took to go from "multicellular colonies" to "concept of an animal". So no, not guaranteed to bounce back from mouldy radioactive slurry.

I think it's better we just change course now and I wrote a book about how we can do that. If you are interested the link is in my profile description.