I have been there, this is the exact feeling you need to get rid of to climb out of bronze. If you lose, maybe, it's not your fault, maybe it is. But you have to remember not to blame any of your teammates. Coz tbh, if you are not playing support, you can pretty much help everyone. On some level, it is your/our fault.
when you accept that, you will start to grow. Even though bronze to silver is not a big leap for some people, it is important for us low rankers :')(
I think the most important thing is not to blame anyone. Coz in low ranks, you will definitely find some players who are bad at the game. Either on your team or on the enemy team. Blaming will only worsen everyone's game.
This is also why you should analyze your KDA, if its because you are good or is it because the enemy is bad? And you'll know your answer.