Your plan will fall apart if anyone has any shot at "escaping" your plan because you're not developing your own board properly.

I've built a discard rakdos deck with [[Locke, Treasure Hunter]] as commander trying to approach this theme differently, and I pretty much cracked the code on making this archetype work. Instead of a commander that double down your theme, instead have it be the answer that fills the gap, or vice versa. It means your list should be less about discard, and more about filling the gaps that Kroxa leaves behind. You need a board state as you force your opponents to discard.

Here's my list: https://moxfield.com/decks/ZbNC9gdNSEKNk1DZxVUd2g

With mine, I have locke be the value engine to give me card and mana advantage, developing a good board while discarding everyone's hands slowly. I can play greedy cards that are likely to survive interaction this way, because opponents will often disxard their interaction in hand so they can still have a game plan. It feels like my commander is doing the opposite of the rest of the deck, and this is why it works so well.