Statistically, of games that have anyone feeding, trolling, intentionally afk/leaving, etc (varies by elo), you will experience about 50%-2n your team, 50%-n enemy team, and n*n both teams having a feeder (these are rough calculations, see an example calculation below):
Example: If there's a 5% chance of a randomly matched player being "useless" (feed/troll/afk/leave/etc), then you will experience one on your team in about 19% of your games (.95^4 is the chance all four of your teammates are not useless, and 1 minus that gives probability of one feeder on your team).
Same probability of "useless player given random matchmaking", you have a probability of the enemy team having a feeder of 23% (all of this math is rounded to the nearest percentage point for convenience).
Probability of both teams having a useless player is about 4% or so. So given the games where afk/leavers are present (about 37% of games if we assume 5% of players are useless, which is a very high estimate even for bronze), less than half of that 37% have a feeder on your team. It's more likely a feeder is on the enemy team.
Thus, unless you are simply extremely unlucky, you actually end up winning more LP from afk/leavers (as if they're on the enemy team it's very easy for you to win) than you lose.
Bottom line: Your premise of trying to blame feeders for every loss you have and saying that you deserve better isn't holding water as it's virtually impossible to have intentional feeders in every game to demote you 2 levels. Looking at your win ratio of 38% in your current MMR, it looks to me like your current MMR (matchmaking rating, a hidden measure of "skill") is actually a bit high. At your ideal MMR you should win 50%, lose 50%.
Your skill level is actually a tad below that of players you're being matched with. Looking at just your ranked games, I have no doubt you have a decent understanding of the game mechanics and how it works. You can't equate that, however, to being good at the game. I haven't looked at deathmaps or anything (I honestly don't want to spend the time right now to do so), but there's a lot you can learn from looking at the statistics.
I think you can improve and climb in your elo - remember your MMR is what determines who you're matched with and could, for all I know, be woefully different than your rank (It's possible you're being matched with players of a silver/gold MMR and that's why your winrate is so low). That will correct itself over time if it's the case.
Sorry for the walls of text, I just want to try and provide as thorough an analysis as I can. Best of luck in climbing out of the MMR hole you seem to be in, and try not to blame others for everything.
