a. Stop rushing your placements. Bronze V is the lowest tier in the game - and I do pity your experience, as some of the players I have seen from Bronze V are terrifying, angering, and saddening to play the game with even if they never speak at all - but it is eminently avoidable if you do well.
Every season I refuse to rush placements, and every season I manage to avoid true ELO hell and at least manage to get ranked into a division where I feel I'm neither too far ahead nor too far behind, and am learning. I waited years to rank - ranked into mid-Silver, nothing to be proud of around here, but still there's a good deal of Bronze skip-the-tutorial-ness that you still don't have to put up with if you are never Bronze. And rising in an ELO system is not like other systems - not like "experience levels", or any unlimited single-player advancement systems. These are old systems, invented largely for chess and other high-skill competitive lifelong games, that ensure that you are as accurately placed as possible against everyone else playing the game. In order to rise, you have to do what it takes to win matches.
b. Not to ask an uncomfortable question, but: did you, yourself, skip the tutorial? Do you follow very basic fundamentals of Silver-and-up play such as:
- Do you push behind the wave? Or are you constantly in front of it, where you're a multiple of times more likely to lack vision and get killed?
- Do you understand that effective CS over the entire game is worth more than champion kills?
- Do you know that objectives also matter far more than champion kills? Do you take dragons, Barons, turrets and especially inhibitors like the pros or do you largely dive behind turrets looking for kills and end up providing a feast for the enemy team?
- Do you understand that the only statistic that matters in a League game at the end is the nexus, and that champion kills become literally meaningless by design after a certain point in the game?
The biggest problem I see in pure Bronze players, consistently, is a failure to understand the importance of minions, objectives, CS, and the wave - that this is a game about using teamwork to siege a castle and managing and harvesting scavenge from armies far more so than it is about champion duels. It was purposefully designed that way and with an emphasis on teamwork - more so than any of its competitors. It is extremely difficult for even a team of supremely fed champions to come back from all three inhibitors down - because winions are some of the strongest forces in the game - and it is rare indeed that a pro team with a free chance to get three inhibitors instead of dueling under the nexus tower would fail to take these objectives.
The TL:DR of this all in one sentence: Objectives matter far more than champion kills.
Truly low ELO players just don't get this thinking. They want to run around and laugh and play and smack their opponents with swords out in the open and without vision, and dive under turrets and fight and be heroes (except that then they die, and feed, and are not), and they don't CS well at all or learn to control the map through vision and turret takes, and as a result they end up never gaining very much experience or gold and literally having zero chance to compete in the later game.