This may be harsh coming from someone who themselves is stuck in bronze right now, but you are exactly where you should be. You don't have a single game with over 200 cs, even when they are going 40 minutes, and you die absolutely too much. There will be games where the enemy team focuses you constantly, and your teammates don't help, and you die a bunch. But your record though tells me you're playing out of position, getting caught out, and not making good decisions in game. You regularly are getting killed 14+ times, including a game with Riven where you died 21+ times. That's just not ever going to be okay. I get it, I do the same thing a lot. But that's why I'm also stuck in bronze right now.
You've got to practice more. You can't play adc if you can't last hit minions. Practice in norms, and focus on nothing but farming and not dying, and then worry about kills. Get your cs up, your deaths down, and then come back to ranked.