I'm Bronze V and here is my advice
Get Lucky
I consistently have 20+kills around 10 deaths and around 10 assists every game with around 180 CS on average
I consistently dominate and shut down my own lane
So why would I still be Bronze V?
Here's the answer...
1/10 Bronze players is a troll... so basically you have a 50% chance that troll is on your team
of the 9 remaining
2/9 aren't very good and need carried so 22% of the champs (That aren't the troll) in game need baby sat
Statistically ending up with all 3 of these players is unlikely, however, it happens and when it does that is an automatic loss.
Oh and you also have to deal with the 16.5% chance that someone on your team will DC that game.
Figured out the math? Good! Now some times to avoid playing!
at around 2-4pm for each time zone the little kiddies start to come home from school
don't even try to play ranked at these times as your statistical chance of getting trolls and unskilled players increase exponentially
Play late at night when the kiddies are sleeping because they have school or earlier in the day whenever they are at school.
On weekends try to play during the day rather than at night because there is a better chance the little kiddies are at home playing games at night.
Follow all these instructions and it still boils down to....
Get Lucky with your teammates...
Hope I helped!!!!!!!!