What's with the boosted bronze behavior?

I was ADC Lucian, got up to 20 kills at 15 minutes. During every "teamfight" my entire team goes ham on the first person they see, wasting everything to take that kill, meanwhile the bruiser and assassin can walk right up to me and nail me in the balls and nobody pays any mind. The next series of events are my team being aced. At that point in the game I could've 1v1'd any member of their team and walked away with full health.

I mean, I'm trying super hard to explain to the people I play with that I'm going to need peel / you can't chase kills while i'm being 2-3v1'd but nobody wants to listen. I know how to carry but I just can't 1v5 that late into the game. Even 2v3'd with a kayle and she ultied herself while I was being focused. That's some premium selfishness. She died without getting a kill either BTW.

I feel like I'm talking to a bunch of bricks in a wall sometimes. Legit, the start of the match, after my first 3 kills, and before the first teamfight I request someone to keep an eye on me or, at the very least, listen to my 105 pings. Tunnelvision sets in and the first player they see has 4 ults and every ability known to man shoved in them while I get chased down and killed in my own base. Why do bronze players just want the kills? I ask this every game, why do you just want the kills and not the win? I can get you kills, it's not hard to widdle them down with (especially) Lucian and I'll let you last hit but I need your help.

Sometimes the people that should be fed are worthless feeders, but these games I have, with such stellar KDA are forfeit with just.. terrible decisions. I'm sorry if me not being able to 1v9 after getting that fed is offensive but I just haven't reached that level yet. This bronze life feels like I'm not getting anymore EXP and the key to unlock the door to the next level hasn't been found yet.