I'm in silver 5 and the biggest thing people need to learn is.
People want to "group up" but don't know how. You can't really just go aram the whole game. You need to figuer out who is going to catch the massive waves, who is going to stop a splitpusher. Sometimes a useless dude just says "fuck it" and just splits for the rest of the game. This is when you need to communicate. If it's you that should take care of side lanes ping otw and chat why you should or if it takes more than one you have a bigger problem.
Back to the main point. Somebody want to group mid as 5. This person may just start shoving, and another person will follow and they will actually follow each other. If there are 5 mia or even 5 people alive, you need to back the fuck up and got get engaged on. If you do get engaged on then just know you deserve to lose lp.
I had a game recently when I got fed and was trying hard to carry but got hooked a few times by blitz, expecting to get my ult n shit off I got nothing off bc of his silence. Still won but I know 1 mistake like that and I don't deserve to gain lp.
Main thing is people don;t know how to not push or farm for a bit. They think the game is so fast paced and they want to keep making that gold and die for 1 minion that would have been pushed to a safer place.
Wait for people, when you gank a lane wait for others who are coming to help before you chase dude off.