Recently, I saw someone being liquidated and crying foul, claiming they clearly didn't hit that price.

Honestly, many times it's not that you see it wrong, but that the oracle feeds prices slowly or quickly: when the market needle drops, the exchange and on-chain quotes are out of sync, and your position is calculated based on that "moment" fed in, so when the trigger line hits, you're taken out immediately, and you only realize it's gone after refreshing the page... It's quite speechless but it really happens.

When spot/derivative funding rates are extremely high or low, be extra cautious.
People argue whether to reverse or continue pumping the bubble, but I default to expecting more volatility, lowering leverage by one level, and not placing stop-loss too tightly, leaving some buffer for oracle delays and fluctuations.

What I don't regret is: figuring out early who’s price is used for liquidation, which can save a lot of tuition fees.
That's all for now, don’t fight with your own position.