I don't think the problem is that low elo players can't play its that they can't play good when forced under certain conditions, at least this is the problem I have when I play ADC.
. I have went bottom lane and done good before when matched the the correct players, or when duo with specific players who are on (Team Speak) or Curse, now I agree ADC Isn't my best role because I never really play it due to (Solo Q) and random players but there is a big difference.
. Then the other case where being matched with players who just don't know what the hell they are doing take for example supports who play Annie bottom lane, but don't understand that if Leona Engages a fight which by all cases she will unless you play very passively that they are going to win every fight at least when I go bottom lane with Leona I will always get an engage off even if the enemy isn't looking for one.
The problem is simply finding players who understand how to work well with the ADC, otherwise you can't expect a game to go well at all, or you personally (Feed) at least this is my problem with playing the roles especially in Solo Q games, the exception is doing something that is called off meta which sometimes when the enemy team doesn't expect players to be doing such because its not common I can usually get my ADC fed under certain conditions.
The main reason I think that players usually in most games give first blood and do badly bot is because its a duo player lane, and sometimes others just can't understand what needs to be done to actually do well in lane phase, and what champions to play, or how to even be playing, (Honestly) almost any champion in a bottom lane can work great, if your mate is skilled enough to actually understand what they need to do, otherwise the game is usually going to go bad.
http://boards.na.leagueoflegends.com/en/c/miscellaneous/YOOZYYeZ-climbing-ranked-by-duo-queuing-two-tanks-in-bot-lane?comment=0000
And when games go bad its usually when the toxicity usually starts which is why its best to play champions that can win early game and force fights early that can be won.
The solution could simply be to add 4 Lanes to League OF Legends, or 5 Lanes, which is part of the reason why some MOBA like Heroes OF The Storm try to remove toxicity by only having 2-3 lanes no specific meta, but still as a player I will personally not play in any lane with players who have no idea what they are doing in that game either because there are more useful things to do and feeding doesn't have much of a impact as it does in League or DOTA.