Recently, I saw in the group that people are sharing news about stablecoin regulation, reserve audits, and at the same time shouting "it's about to de-anchor," and the emotions really outrun the information.

Speaking of block builders, bundles, and such, I think retail investors don't need to turn themselves into researchers; just knowing that "it will affect my transactions" is enough: after you click to trade, you don't immediately enter the block, there will be packaging and sorting in between, and someone can bundle several transactions together to send in, so the slippage you see or being inexplicably sandwiched is often not because you're clumsy, but because that's just how the process works.
The turning point is, don't get caught up in conspiracy theories because of this...
My own approach is pretty simple: split large orders into several parts, avoid chasing during the busiest times, and turn on options that protect the transaction if available.
As for deeper details (who is cooperating with whom, exactly how bundles are assembled), honestly, knowing them might not change the outcome and could even affect your mindset.
First, control what you can, and treat the rest as noise to filter out.