How does one carry and climb?

Learn a role and make decisive calls to stop your bronzie teammates from running around with their heads cut off.

Honestly, if you're trying to climb out of Bronze/Silver, forget team plays; they're not going to happen (often). You literally have to do what you know you have to do to win: keep lanes pushed, gank/punish over-extenders, secure objectives, destroy Nexus. And for the love of god, WARD.

If you carry hard enough, you should win those close games if you follow their advice, usually they listen as long as you're the fed person. Sometimes it doesn't matter though, you can end up the only person doing well surrounded by feeders and you lose regardless. You shouldn't be penalized as much for losing those kind of games though, imo.

Just play an aggressive duelist like Darius or Riven and force the enemy team to send more people to you. You take the pressure and kill them anyway. That gives your team more breathing room to farm and push.

play enough games so you quit elo hell: that situation in which the system really doesn't want you to win more than 50% of your games.

Obligatory "git gud"

Don't kill me. It was a joke.

Splitpush the hell out of them unless your team needs you to stop them from taking your nexus. Don't 1v3, or 1v2 if you're not confident. Feel free to take multiple 1v1's.

Don't know how many games I've solocarried with Fiora.