I hovered around the top of silver 1 then fell back to silver 2 about 3 times. I started playing characters that can carry harder from the jungle (Xin and J4) and improving my own play, and now I'm gold 5 and about to hit my gold 4 promo series.
It's frustrating. Some games you can do well and just can't save. But I guarantee that if you work hard on yourself, figuring out your own mistakes and how you can contribute more to every aspect of winning, you'll start winning more than you lose and climb your way out.