I don't understand how to carry anymore. Help?

After taking a year and a half+ break from "seriously" pushing Ranked (was Gold 2 at my highest), I decided to come back. I was placed in Bronze 2. I didn't think much of it because the season is new + I'm still readjusting to the game and have a lot to learn. But I've been playing for a few days and can't seem to move up at all towards Silver+.

Like I said I'm still practicing my mechanics and getting used to the game again after such a long break. But I just can't find a way to carry my teams (my most successful lane so far is Jungle, but I get bored of it after a few games. I much prefer top and even mid to a lesser extent).

I feel like I lose virtually every game where 1 person gets tilted or some people straight up refuse to communicate. Obv I'm not going to win every game and some games aren't able to be carried. But I feel like I'm missing something about the new game.

I guess what I'm trying to get at is: What do you guys do to carry and what tips do you have for a top/mid lane player specifically? Everything from general strategy to champ picks. Thanks.