Let me talk to you about kills
High kill count doesn't mean you're a good player, it usually just means you're good at kill shotting and people should stop being in awe about it. Honestly What Riot should do is if you do 70%+ more of a persons health, and they die within x amount of time to you, tower or a teammate you should get the kill and whoever got the final blow should get the assist. This would make a lot more sense and shut down these ks trolls hard. But naturally like most of my ideas that solve big problems, they'll be ignored and the downvote trolls on here will do there thing.
These people can only support because they can bomb the crap out of the enemy team(or go in and do half the enemies health in damage before the adc even starts attacking (>>)