Some people do that to see when people are on win streaks or losing streaks. I personally don't because it doesn't mean much to me. Each game is a new game in my eyes, and I look to improve myself. Some losses ARE from team mates, it happens. But they are never the reason I get stuck at ratings. That is solely on me.
I don't blame people in game, even if I truly believe they were the reason why we lost. I try to stay positive. 90% of this game is mental. If you improve yourself enough, and you don't put your team mates down, getting a bronze player in your silver games should still be winnable.
Whether that other person is as good at the game or not doesn't matter. They are still a person behind that screen, and you calling them trash is toxic. My advice to you is work on your attitude, your win rate will very likely jump up if you do.