MEV, to put it simply, is when someone on the blockchain can "cut in line." You think you're waiting in order, but in reality, others are watching what you're trying to buy or sell first, then deciding whether to stand in front of you or behind. The biggest impact isn't "a sense of fairness," but rather the small slippage and transaction prices for ordinary people: those extra few fees you pay, the few coins you miss out on, add up to quite a bit.

Recently, many new L1/L2s are offering incentives to attract TVL, and veteran users complain about "mining, extracting, and selling." I understand. When the incentive period has high traffic, the competition for order placement becomes fiercer. The ones most likely to be squeezed out are normal coin swaps and position increases. There are many tutorials, but I only look at two types: one explains how to reduce slippage or set trading parameters, and the other explains the on-chain ordering mechanism—who profits and how. Don't expect it to be completely fair; the best you can do is avoid rushing in during the most crowded times or simply split your trades into smaller parts... I just survive like this myself.