Pardon my lack of humor, there were almost 1 million silver or lower players at season end. I'm sure at least half of them have this same "qq I can't win games because of rng" mentality that op has.
Honestly it gets old, its like listening to excuses of spoiled kids. "I failed because my teacher hates me" "I don't understand the material" "Who needs math anyway?" I've been listening to the league equivalent of these excuses for 5 years, just learn that problem in games is your attitude and start winning games.
Maybe I am just getting old, I get tired of seeing the younger generation who you can't leave alone or they won't accomplish anything either. Either way it isn't a "git gud" post, its a stop complaining about things you can fix post.