How to climb out of bronze elo hell? Elo is 700

So. I do have another account that I got to gold like 2 seasons ago, barely played it last season and got silver. This account I'm on now I haven't played in a very long time (2 years) and was high silver then. I played my placements and I got put in bronze two. I've played over 50 games and i'm still in bronze 2. Made it to my promos once even got a free win and lost it.

I do well almost every game. And in every game all other lanes feed to the point of which I can do nothing. People say it's easy to climb out of bronze.. but NOT on this account. It seems as if the system keeps purposely putting me with the worse players and keeps giving the enemy team the more skilled players. How in the F am I supposed to get his account to gold or higher if it's always the same thing every game. My other account is much easier I get free wins in my promo and I get decent teams 95% of the time. It's almost like this account i'm posting from is ruined and you're not to meant to move up. I gain 23 lp per win and lose 20. On my other I get 24 and lose 16.

I don't want to hear, learn at least a few champions from every role because I own all champs on this account and i've been playing since early season 3. And I have mastered over 19 different champions. {{champi