As a former plat jungle main silver is extremely luck based
The amount of skill difference between some people in silver elo is enough proof that this elo is very luck based. Some people get absolutely destroyed in lane and with some people you can tell they have much better knowledge of the game and much better mechanics than the person they are playing against. Almost every game is you stomping or getting stomped. When I climbed to plat I had a much easier time going through gold than I did through silver. If you constantly have the most CS in the game and a high KDA you will eventually climb with some luck and overtime the luck should even out. High CS and KDA are so important in this elo because people don't listen to pings and are not interested in taking objectives. They play the game like team deathmatch and you have to play their game and just play it better. Still doesn't change the fact that it's largely luck based. Other luck factors:
-12 year old kids who flame all game in broken English and think they're faker -AFKs( includes people who queue up and feed all game then link their 500+ ping in chat after every death) -Int Feeders -Team comp -What team has more OP or meta champions( In my exp this season is terribly balanced) lol Lucian over 50% pick rate and win rate totally balanced though. Jungle is also terribly balanced. -smurfs also play a large factor