Why did my transaction fail but I still paid gas?

Help! Why did my transaction fail but I still paid gas?

I am losing my absolute mind right now. Seriously.

I was trying to swap some ETH for a random meme coin earlier today—just messing around on Uniswap—when the whole thing completely bombed out.

The slippage was dialed in perfectly. The wallet connection was completely fine. Yet, here I am staring blankly at Etherscan, scratching my head and screaming at my monitor: exactly why did my transaction fail but I still paid gas?

It's infuriating.

I lost about forty bucks.

Not exactly life-changing money, sure, but burning cash for literally zero return hurts my soul (especially in this miserable crab market). When that comforting green checkmark violently morphed into a red warning symbol, I automatically figured the network would just bounce those funds right back to my MetaMask.

Nope.

My ETH is gone forever. So, my main dilemma essentially boils down to this incredibly annoying riddle: why did my transaction fail but I still paid gas?

I get that network validators need fair compensation for their computational sweat.

I really do.

But processing a junked smart contract interaction feels exactly like paying a cabbie who immediately drives you straight into a brick wall—and then has the sheer audacity to demand a premium fare anyway.

It burns.

Did the router auto-reject my swap because a sneaky MEV bot front-ran my slippage limits the split second before the block finally settled? Was it a dreaded out-of-gas error that abruptly choked the sequence?

My specific troubleshooting steps so far:

• Hunting down the precise reverted flag on the blockchain explorer.
• Bumping up my max gwei limits slightly (which actually made the financial penalty sting much worse).
• Googling why did my transaction fail but I still paid gas? repeatedly until my eyes physically bled.

Nothing makes total sense to me right now.

If anybody can break down the hidden mechanics behind this brutal system—or share a bulletproof trick to prevent getting continually robbed by aborted executions—I'd owe you massively.

Honestly.

I just want to understand the raw, technical reasoning behind why did my transaction fail but I still paid gas? Let me know your thoughts!