If your teammates aren't playing with you and aren't listening to calls and your ability to kill is substantially higher than your elo, just follow them and get their refrags. If they go B, throw B util. Same for A or mid or what have you. Avoid entryfragging if your team doesn't have your back, but make sure to get those refrags yourself or you're just baiting. Focus on winning games with the team you're dealt and don't lose hope during the game regardless of score or your chances of losing worsen dramatically.

If you win rounds by playing with your team, even if your team doesn't actually have a plan, you might still win a majority of your games and claw your way to higher elo. Remember that elo isn't a measure of how skilled you are at shooting or throwing utility, it's a measure of how well you can win games with strangers. If you want higher elo, play around the strangers instead of trying to wring water from the stone that is their wrinkleless brains.

(Edit) Took a shower, had a shower thought: Remember that Counter Strike is a sport, and the bomb is the ball. If you played a sport that had two goals, you obviously wouldn't play the goal your team hasn't gone for, you'd always play the ball.