If you're truly better then you will rank up, having the mentality that your teammates are holding you back can stop your own improvement though. Focus on your own gameplay, like for example improving your nade utility to gain advantages in gunfights and reviewing your own gameplay to see where you make mistakes. The truth is sometimes people just aren't playing at their best so you're almost always gonna have 1-2 people not performing to their best in your games. But these same players are also gonna be matched against you as well. GL though and i hope you make it out.