Recently, people keep asking about block builders, bundles, and such, making it seem like if you don't understand, you'll be kicked out of the market... Honestly, retail traders just need to know that "your order may not execute in the order you see" is enough: someone can bundle transactions, cut in line, and eat your slippage dry, so don't blindly believe that a candlestick is the result of "fair matching."

All you can do is three things: don't chase after prices, don't set too large slippage, and use reliable routing/private transactions as insurance.
The rest is up to probability—don't think you can win over professional arbitrage teams just by reading a couple of educational articles.

Others think: understanding block builders and bundles can help counter MEV and lose less money.
In reality: losing less mainly depends on controlling your hands and position size, and not giving away money emotionally.

Also, these days, people are using ETF fund flows and US stock risk appetite to explain all the ups and downs... Fine, they can be referenced, but don’t treat them as gospel; no matter how good the external narrative is, impulsively placing orders can still get you wiped out in one go.
First, stay alive, really.