I sometimes question people's logic

So to give a bit of backstory, i was playing katarina, of course like every other game, i get counterpicked with kassadin, for the majority of that lane it was about even whenever one of us died, so did the other. There was also a fiora and shyvana in their team along with tristana and lux, that entire team can stop my ult excpet for lux. So when i get flamed for dying, it just doesnt make sense to me, i get counterpicked so i play safely and got dove? Therefore , feeding? Okay then