That's the beauty of the new dynamic queue : riot just gave bronze scrubs (sorry for that) an easy way to get boosted out of their elo. Honestly, if you think this is your only way to get out of bronze, it's probably because you belong to bronze. It's not that hard to get out of it if your not dumb. You just have to carry the hell out of your teammates and end the game before the 30 min mark. You don't believe me? I ended silver4 in s5. Got bronze4 after placements. Now im silver 1 after a little more than 200 ranked games.
If you ask to get boosted to silver, well, let me introduce you to the silver elo. It's even more disgusting to play in silver than playing in bronze. Why? Because the placement system is fked up for new players that have never played ranked before. If they win 2 games out of 10, theyre placed in silver 5 (3-4/10 : silver 4, 5-6/10 silver3, and so on). So in silver, there are a lot of little scrubs that dont even have 200 normal wins and play ranked, and get stomped every game and feed their a!s off. They are even harder to carry than bronze players, that actually have some experience into the game from demoting from silver.
Conclusion : if you cant get out of bronze by yourself, you'll probably be stuck in silver more than you've ever been stucked in bronze.
So now you may think : then why not get boosted to gold? Hmhmhmmhh. In gold elo, you start playing with and against people that are actually good at the game, those who will climb easily to high gold/low plat. So if you get there by being boosted, well, you'll get sh!t on, because you dont even have the skills to climb the bronze elo.
Sorry if that was rude, i just wanted to make things clear.
TL;DR Git gud. Play alot of normals and try to learn every role decently.
Also, the thread i posted in my first comment isnt all about the "classic" stuff like you said. There's more. You probably didn't even read the third of it if you think it's classic stuff. By the way, if you don't have the "classic stuff" down, you definitely won't climb.