Why do people believe in this so called 'elo hell'?

So here's my story, I started in season 5 January 2nd, and got to level 30 some time near march. Right as I got to level 30 I purchased all the 450 IP champs I could and did ranked. I got played in Bronze II, I was thinking wow I thought I would do maybe a bit better and then I just kept playing ranked. A few days later I got all the way down to Bronze IV and I blamed my duo partner because I only lost games when he was there, now at the time he was doing bad, but I wasn't doing any better; we were both brand new to the game thinking we were good, when we were really about as good as a Bronze V on a lucky day.

For the next 6 months I was going up and down in LP but staying in Bronze IV barely playing ranked at all, I was fed up and I didn't think I deserved where I was at. Then I started playing again recently, but I didn't do what I usually did; I didn't just instalock in mid lane and try my best to carry then feed pre level 6, instead I got forced into support. I was angry and flaming thinking that this was going to be the worst game ever because I didn't get my prefered role, but eventually I decided I would play and I did great, everyone had great communication I got some nice picks and everyone had great morale. For the next couple games I kept playing support and I starting climbing. I got to my promotionals and lost them, I was so sad I thought that I had gotten better, but then I kept on playing and then I got to my promos and won them! I was now in Bronze III the only progress I had gotten since way back in march, I was really happy, and I kept on playing. I got on a few win streaks and a few losses too then eventually I got to my promos again after about a day, I won them first try and it was a great feeling knowing that I wasn't as bad as I once thought, I then bought and starting doing even better than I was doing with . A few days later and I am in Bronze II promos I win my first game, it was fantastic, but then I duo'd with my friend and it was chaotic, nobody was doing good we all fed early and we lost it around 30 minutes barely even taking out 2 towers on our side, I was frusturated and I thought this was the end and that I was going to go on a losing streak and get back down to bronze IV (I was losing a lot of normals games before I played this second promo game), but then right after the game was over I took a 10 minute break, I cooled off and then did my last game. We went 35/7, they took out no towers, and they forfeit at 21 minutes. I am finally in Bronze I.

So the moral of this story is to show that it's not impossible to climb, you just have to play something that you are good at; not everyone can be a solo laner, and I guess I'm just a support and I'm perfectly okay with that, every team needs one so it's just going to be me :p I believed in Elo hell for a while, but then it all went away, I think that it's more or less people who want to play carry roles and they haven't tried out the other roles like support, or even top lane to be honest. Not to say a support cannot be a carry.

Although I haven't made it out of bronze yet, I think I'm well on my way and I should be in silver by the end of the summer if I keep up this pace. So what did you do to get out of bronze, or are you still in bronze and you can't get any help to find your way out? Do you believe in "elo hell"?

TL;DR Try out other roles and you're likely to climb the low elo.