Edit: YOUGOTKILLEDBRO - I know this is a long read, but please take a look - something here may help you.
I got placed in bronze as well - yeah it sucks, but the fact is, there isnt much divergence in skill level throughout bronze. My entire way up, never experienced someone extensively better than the rest of the players (no, not even me), and I was in Bronze a LONG time.
Looking over your match history (lolking op, pls nerf) you need to do a few things.
- GET THAT CREEP SCORE UP. I had (and still have, honestly) a hard time with this. last hitting a bit better (I assume, didn't watch the game) and such will help. The trick is you cant sacrifice your team for your farm, so you have to balance keeping up with participating (again, you may already be doing that, I cant really tell, just looking at your cs)
- You had a few fairly strong Vayne games a bit before I posted this. You really seem to do well with her, so congrats on that (I suck on vayne) - but she can be hard to teamwork with. At its heart, League is a team game. You will NOT win trying to solo carry (unless the other team is just bad, and you are playing one of a select few champs)
- If you play ranked while mad, you are gonna have a bad time. NEVER. EVER. play ranked mad. (jsut advice that helped me and a couple others getting out of bronze - you know if you need it or not.)
- NEVER insult, ridicule, or abuse your teammates. Teemo jungle thought he could 1v2? Point out, POLITELY, its a bad idea, and that his choice of jungle was likely going to a negative impact on his play. (this happened to me btw) - making people feel bad and self conscious makes them play WORSE. If you really are THAT MUCH better? HELP them. POLITELY and PATIENTLY explain to them what they did that was wrong (and if you say "stop dieing" and call that advice, you are literally just being a useless asshole) and give advice for what they could do in the future.
- BE A TEAM LEADER. If you are pinging (APPROPRIATELY AND RESPONSIBLY, not 6-8 times) objectives/towers, calling to group, stating targets and goals, you can LEAD a bad team to victory. And often, they will greatly appreciate it, and even play better because they FEEL like they are part of a TEAM. Not fighting each other while the other team wins.
This is all advice that got me out bronze, and can be EXTREMELY helpful is pulling through - but two more things:
A) You still wont win every game. While it is not ONLY trolls/afks/etc, Bronze does have the HIGHEST concentration of them. All you can do is accept that it is part of the game, and move on. Focusing on it will make you rage, and play worse. And throwing? That happens too. League is still, to some extent, a strategy game from start to finish. Good plays by a losing opponent matched with mistakes on your teams part can CRUSH your victory chances. IT HAPPENS. TO EVERYONE.
B) If you get to where you just can't take it, dont become a toxic player. Take a break from ranked, play norms. Practice, and get better. Then next season hope for better placement, and move from there. I have NEVER been in B5, but I have heard stories, and it does TRULY sound frustrating to a massive extent. Keep in mind that this is a GAME, for ENTERTAINMENT. You do not have a future or job or pay or college riding on this. While it is ego boosting and such to have a high elo, don't ruin your attitude or enjoyment of league in exchange for it.