As I've experienced in the past, this time of year, Silver is full of boosters, Gold is full of people who got boosted to G5, actual gold, and high elo smurfs (lol). Win trading isn't much of a thing except D1 and higher...mostly in Challenger when queue is just and small handful of people playing all at once. It's more unlikely to be paired with your friend if you and him queue at the same time in different lobbys in silver than it is if you're in a pool of just 200 people (but only like 20 are playing at that moment). AKF, toxic people, and inters are just part of the game for sure, especially in lower elo, but not win trading.