Why is it so hard to climb from silver 2 ? Huge curve

Hello guys, this is not a qq thread i’m actually looking for advice, not just qq about my situation. So i started Season 5 in Bronze 4, i climbed up to silver in about 150 games. I played a ton of games in silver, improved a ton, now i have about 470 games played this season, so like 320 in silver.What i don’t understand are my bursts of win streaks followed by massive 15 game loss streaks. It seems like every time i’m in silver 4 i go on a Massive win streak all the way to silver 2 and then get demoted right after, followed by a HUGE loss streak. Plz don’t give the “tilting” argument because honestly while i do play to improve, it’s still a game and i mostly have fun with it, i don’t rage and get stressed over losses i just mostly enjoy my self :D what inspired me to ask this was this time around i climbed back from silver 4 all the way to my gold promos, after loosing it i lost 5 games in a row, ok, i took a break of 24h. Next day, nother 3 losses, so i took another day break, followed by 5 more losses...then the next day bursts of loosing streaks with 1 game wins interruptions to those streaks, but back to silver 3 zero lp... Had a solid 65% win rate with vayne (my main adc), dropped to 52% and other champs i tend to win with. I did my research and a lot of people say silver 2 is the new elo hell, i never shared from this belief but i will say that particularly between silver 3 and 1 there is some weird shit that happens with the match making system where once i pass silver 2, i seem to have every friendly lane loose, no joke i have 6 games in a row people rage quit in 5 mins or ff 20, whats the deal? Am i just having some bad luck, have i been getting lucky this entire time?whats going on guys :c