Have a 1/19 bot lane on my team, but I'm the issue I can't climb.

1/19? What did you guys do to help them? Also show me the game. The stats for that game.

Clearly you were suppose to go bot lane that game.

lol nope why would you go help someone that literally cant stop dying, or refuses to play safe/doesn't know how to. <<< Harder to gank a losing lane anyways. Also when bot lane dies this much, they probably aren't in lane a lot, seeing they are dead. Also at some point you might just think for one second and see that these are the worst people on your team. Some people cant be helped.

theory is this will even out and something something something.

Weird how this 1-19 bot lane doesn't exist for you on any stat checking websites

simple. just go 19-1 and it with automatically counter your botlane.

I've also heard that getting 500cs auto wins the game.

Solo Q is the abbreviation of "babysitting", if you can't babysit and win every lane for the 4 randoms you're not going to win, plain and simple.

You won't have that 1/19 bot lane on your team in every game, and most likely will only ever have them in one game, maaaybe 2 if you're unlucky. (Unless you're duoing with them, in which case, stop.)

Climbing isn't about individual games, it's about your consistent performance over lots of games, since you're the only constant between your matches. If you're performing at a level above your rank, you'll climb, and if you're not, then you're not actually consistently playing at a level above your rank.

(Also note that consistency is a key word there. Plenty of people blmaing their team mates and/or "elo hell" who have some fantastic games to point to, but tend to gloss over the ones where they were far less impressive.)