Tier Immunity needs to be eliminated - please introduce a "Survivor Series"

At Silver I, over the past few months I've increasingly noticed that the amount of trolling and overall toxicity and negative attitudes have increased in every match. More and more, there are players that are not interested in being good teammates, or even contributing to a win. They are there to troll and to generally suck the fun out of the game for the other 4 people on their team. 9 times out of 10, these players are Gold V. I read and hear other players' stories of how they have suffered through the same situations in Bronze 1, Gold 1, Plat 1, etc.

Gate keeping mechanics that are based on skill are important to the game and contribute to elevating the level of play.

Gate keeping mechanics that are the result of which team is lucky enough to not have the Gold V troll (or trolls) on their team detracts, severely, from ranked play.

Mechanics that provide nearly no negative incentive to purposefully tanking a game (such as tier immunity), are the primary driver of the second of the two mechanics i've listed above.

True, if a player tanks their rating to some impossibly low level, they will be demoted. However, this level is laughable and easily overcome by winning a few games here or there (sometimes, despite that player's efforts to troll). This system fails at reducing the amount of griefers in the game.

I propose: When a Silver, Gold, Plat, Diamond, or Challenger V level player reaches 0 points, their next loss places them in a "Survivor Series" best 3 of 5 matches. You win, you get to keep your tier standing. You lose, and you are demoted. Simple as that.

Provide more incentive for players to not purposefully throw games, and you will see more people want to play.

TLDR: hit 0 points in any V division, fight for survival in a 3 of 5 series, or be kicked out of the tier.****