People get so angry they can't recognize their own CRITICAL mistakes.
For example.
The last game I played I was against a Kled that managed to get 2 kills on me early through ganks (and one pick that should've gone in our favor its just my jungler didn't collapse on their jungler when he was in tri and mine was at red. It was a Xin btw so this was a guaranteed kill cause his early game is busted) but anyway he made critical errors that I abused to get back into the game despite the rough early.
- He permanently pushed me thus allowing for me to safely freeze/farm under tower which also nullified any gank potential on me.
- Took trades where he had abilities on cool down vs mine all up.
Abusing these two mistakes allowed me to basically farm to victory alongside good macro, however he just proceeded to flame me in chat saying I got carried by my jungle ganks (ganks where he pushed with no vison via tiamat) and by my bot lane (who were constantly getting caught out). I made the second most gold on my team but I got carried. Also, when I pointed out to him what actually happened that allowed me to win he denied it all simply saying I'm plat and god carried.
The logic of toxic players.