I feel like this falls under player behavior
Dear egotistic players of all (carry)roles.
Learn to accept when you are getting carried. It's not hard, I know your ego as a marksman or a mid does not allow you to get carried but when your jungler or top is fed as fuck and getting you turrets the least you can do is apply pressure else where or defend to give him or her some breathing room.
Accept that you are not the only one capable of carrying. Accept that not all kills will go to you and ks'ing from the person carrying you is immature. Accept that your role now is to benefit the team rather than "carry".
You are of no use to anyone when you are trying to chase kills or make bad calls. Splitpushing bot while the enemy is at our mid is not helping anyone especially when you have no escape and are squishy as fuck.
So please, acknowledge that this is a team game. Acknowledge that you will get carried at times and the best you can do is support the carry getting you turrets and kills because they obviously know more than you do.
Tl;dr Stop deluding yourself that you are the only one that matters, league is a team game, even a support can carry if they play well enough.