Your ELO is pretty correct
I dropped a whole league from s4 to b3 im now b2 with only around 13 actual ranked games after placements. I see how ppl say elo hell but really if you can put in some time... you will climb out rather fast if you actually deserve it. I climbed out of b3 in about 6 games counting a loss in the promos. If you easily stomp your lane then you should climb if you learn how to carry a lead. I struggle with the end game more than anything else but my early game is on point with my mains. If that goes bad then just do what you can, farm and DO NOT FEED or afk like so many noobs do. Now i have gotten the 5 death feeder by 10 mins the two lanes lost and jungler picking his nose. If you play right you will carry. I had a Yasuo go afk after feeding and we almost won the game we were at inhib and team thought baron would be good. But none the less I LEARNED from it and thats the point. Just grind it out if you actually want it. I wish i had more time to play but life is life and this game isnt life. Maybe over the summer some time I will actually get to gold where I know I can get. Try to learn and not just rage... thats probably why you lose. Its not your team it is you.