I've recently been asked how deep retail investors need to understand about block builders, bundles, and such... Honestly, you don't need to know how to write code, but you should understand how your trades are "passing notes." I'm just a detail-oriented person, and the conclusion is simple: as long as you can distinguish between "publicly dropping into the mempool" and "privately packaging and sending to the builder," you'll avoid most traps. For large or slippage-sensitive orders, use private routing or protected aggregators, even if it's slower—don't try to fight it head-on.

Beyond that, remember only two more things: 1) Poor trade quality isn't necessarily due to your mistake; it might be because the routing sent you to feed MEV; 2) When you see chaos on the chain (like cross-chain bridges being hacked again) or oracles acting up, and everyone starts shouting "wait for confirmation," don't rush to front-run. Builders love to exploit your FOMO. If you lose, review your routing and slippage settings—don't blame the market, just start there.