How to actually climb bronze league.
Step 1: Get coaching and fix what you're doing wrong
Step 2: Get really good at one champion on each role or AT LEAST be able to play off role champs competently. My champ pool is Jungle:
Mid:
Top:
Support:
ADC:

You will notice that my champ pool consists of almost entirely hard snowballing, damage dealing, carries.
Step 3: Play mastered champions, destroy bronze 5 morons in lane, exploit early lead, carry, profit.
Additional important info: Ban heavy CC champions. ALWAYS. You're idiotic bronze teammates will get slaughtered in team fights until they learn half way decent positioning.
Don't flame your teammates, they aren't trying to be trash, they just are. We all were at one point, some just come out of it quicker than others. If you flame your team, they will play worse than they already do (Not fucking good, trust me on this)
Exploit the bronzies own stupidity, the enemy team is probably just as dumb as your team is. I currently have an 82% winrate on Udyr splitpush because nobody comes to stop me, and when they do, its usually one person which i kill and keep pushing. If the entire enemy team comes to stop you (happens way more often than you think) waste their time while your team hopefully does something useful.
Itemize correctly, build MR if your team feeds the syndra, build armor if your botlane is 0/7 at 15 minutes.
Use common sense. Their jungler cant kill you pushing top lane if the top laner is dead and jungler was seen at the bottom of the map.
Bronze games are all about towers, they will over extend their territory and you can catch them out, usually multiple times, furthering your lead and tilting them.
Mistakes I used to make frequently:
Do not stray from your champion pool of mastered champions. You arent helping your team by picking someone who fits into the comp better, this is bronze.
Dont experiment, find something that gives you a high winrate and stick with that.
Dont play high winrate champions because they're high winrate, this is dumb as fuck. Play the champions you're good at.
I was placed in B5 this season doing some of the stupid things i mentioned above, i played about 40 games and got stuck in B5 because i strayed from my champ pool. Once i realized what i was doing and got out of the victim mentality, i started playing what i knew that i was good at and climbed to bronze 1 40lp in fewer than 60 games after that. I'm still climbing averaging about 60-80 lp per day playing about 5 games.
This concludes my guide of how to climb bronze league, and this is how you actually do it. I dont want to hear any of this shit, "i cant climb because i get a bad team every single game!!!111!!!." I just told you how to climb with absolute retards on your team, do it, let the results show, and if this doesn't work then go back to step 1 and do it over again.
Peace -Lmaogetmooned