Reaching out for helping hands

Anyone who takes a cursory look at my match history (or my ranked history (28% WR S2)) can see I'm really bad. Really, REALLY bad.

This normally wouldn't bother me too much and I would just put it down to a bad streak, but I feel like I've been rank shamed, called autistic, been called 'kid' etc. more times in the last month than I have been in my whole history of playing league (joined around the same time jinx was released).

As much as I would love to just drop this game, it's one of the only ways I've been able to stay connected with a few close friends, and so I would like to ask for help re learning this game; because clearly I've lost whatever ability I've once had and I don't enjoy ruining my friends' games.

Any advice or help I could get, particularly things that have helped you out in the past, would be appreciated.

Hope you're having a wonderful Christmas :)