I can't win a game to save my life right now.

I haven't been playing much throughout the school semester. I've just started playing more again since I'm on winter break. I usually queue up with my brother or friend into a normal queue. I can't for the life of me win a game and the one game I do win after each 6+ game losing streak is usually a fluke or really bizarre.

Every game I have people that are bad in all the worst ways. They don't understand what a map means and their reaction time to pings and objectives is so slow that it costs us any lead we have. Like I don't understand why people drag their ass so much. Ping at dragon after we just won a small skirmish means do it NOW not after you half-ass clear a wave mid because then the enemies respawn and come and kill us because you took to long to help us. The worst is that they can't understand why their slow pacing is losing us the game. Everyone seems to have this issue. Even the people who go like 8/0 in lane can't help the rest of us close out the game and they drag their ass to every objective. Like I don't understand. The worst is the enemy team always seems to know whats up and how to work as a team. Their pacing is amazing and it's too fast for my teammates.

Then my teammates can't teamfight. They miss their cc, they don't know how to peel or perform their roles, like how is this so hard? There is a wealth of knowledge online for the most popular game in the world and people still make it to level 30 and lack these simple ideas? I just don't understand. I don't want them to carry. I don't want them to dominate their lane because I know there is a late game. I just care that they can group, help, and work as a team member, but they never can and I don't know why....

Like why do I keep getting matched with these people who lack these concepts?

Is it because I'm queuing with my brother and friend? They are pretty bad to be honest but I didn't think it would queue us with other players that are just as bad if not worse.