Well, I know you are better than me. So it's just a situation of mine.
I'm at Bronze4 70 LPs or so. My current win-rate is 70 - 80% with Shyvana jg.
I can get + 13-16 LPs for winning. (- 22-23 LPs for losses)
your.gg estimates
I could be Silver4 at the end of the season.
your.gg/rawcarbogrin
I'm climbing with this.
Of course, my friend list is filled with summoners I don't want to play with.
190 players are on the blacklist right now. I also check op.gg for dodging.
I've tried playing Annie/Ekko/Leblanc/Zoe mid, Quinn/Tryn/Sion top, and Sejuani/Evelynn.
But my MMR seems to be too low to become Bronze3 with these champs.
It's really a sad thing...
Some say Yi/WW/Xin are recommended for their fast clearing.
But I just preferred Shyvana playing as bruiser somehow.
Shyvana also has a fast clearing speed, too.
Fast clearing enables you to do what you think should be done.
If Bot/Top minions should be cleared at the mid game,
you can do it instead of ADC/MID when you have all-mid teammates.
If you have to protect the mid tower ALONE,
you can clear waves and wait for your teammates.
You can also help the lane control;
If it's freezed and dagerous, then you can help some clearing.
If the laner is in low health you can help push the minions for recalling.
If the laner is recalling at the wrong timing, you can push the lane instead.
Barron bait;
Basically you cannot "Barron bait" at Bronze. But you can "initiate" the battle.
Your teammates tend to follow you if you start attacking enemies.
CSs;
I know some smurfs. Their CS scores are 6-8/min. 6 is very low for a smurf!
What's my CS? 6.7/min AT MOST!
Let's just accept the fact. I'm no good at CS efficiency.
(This is how our game is ruined by smurfs.)
My view on Elo hell is... there should be various hells in Bronze and Diamond as Riot says.
I do not doubt its existence at all. Or you just need to play more games:
Win Rate / Expected Number of Games to Climb One League
51% / 1800
55% / 360
60%/ 180
65% / 120
The Math of Climbing in League of Legends
Anyway, a higher winrate might not be the matter of your technique.
You just have to choose the right champs. But it's a bit boring.