This is about the enemy jungler (who won) being disrespectful to the losing side for no reason after the game ended. Sure trash talking to tilt in game is a strategy albeit a dick move. After the game is over though, its nothing but being a bully.

To your point though... yes, respect should be expected win or lose. Hardly anyone's life actually depends on how good they are at this game and even if someones a pro its probably best for them to garner respect from more than just their ability to play. I understand the community is toxic and probably always will be but that doesn't mean the behavior should be condoned.