How to get ahead in Bronze 5 without help...
That was a joke.
It's actually completely up to chance how good your team is and has less to do with how good you are.
For instance if you get bad teams every game there is no way to get ahead no matter how good you are.
You can get 40 and 0 but if you team is feeding and aimlessly wandering the map there is no way to get ahead in Bronze 5 what with all the rage quitters and intent feeders.
How good you are has been irrelevant ever since Riot ruined Fiora's game play.
There is no longer a champ you can 1vs5 with when all 4 of your dummy teammates are dead as you 1vs5 at the nexus.
Thanks to Riot... This game now requires your team to also be good to get ahead.
If the cards aren't in your favor there is no way unless you have a friend who is good.