Iirc someone made some elaborate post showing how "bad luck" has nothing to do with you being "stuck" in silver. If you have been silver for a long time, it is WAY more likely that you ACTUALLY belong there. You could have someone carry you to gold or higher, but eventually you would just drop right back down to silver.
Not trying to be mean or anything, but it's the truth.
(And FYI I used to feel the exact same way... was 'stuck' at silver 1 forever...eventually I had to just man up and admit it was me that was the reason I didn't advance. I took a long break from ranked to work on my fundamentals and am now getting back into it again..)
Good luck regardless of what you do.