Yi 1 shot with 1 auto 0 crit

Things to note.

His Rageblade was fully stacked. He's 4 levels up on you. He double striked, meaning he triple procc'ed Devourer. You weren't at 100% HP in the first place, like hell, 60%. Red lightsaber=true damage triple strike You're in melee range of a Yi without Highlander.

All in all, I'd say this was expected to happen.

It wasnt one hit. He had double attack ready from his passive + devourer. It was 3-4 hits in one.

any champion will one shot adc with 4 lvls ahead