Your teammates are not the reason that you cannot climb in any given game. Everyone has βbadβ teammates from time to time, yet many people have climbed from the worst rank to the best rank. If you are truly at a higher bracket of skill than the other people at your rank, you will climb. Being in the mindset of βIβm stuck because my teammates are trolling/badβ will keep you from improving and make you a worse player. If you go into a game with the mentality of βmy entire team is terrible," your own mental is already working against you.
Team morale is also a big thing in online gaming. If you are having a negative impact on the mood of your team, they are more likely to perform worse due to tilt or troll you intentionally.
You should keep in mind that you are the only consistent factor from game to game, and as a result, if you are not climbing (over a long stretch of time), it is because of problems that you inherently have, whether it's your game sense, your mechanics or your teamwork.