The gameplay of the last 2 games ive played

Im Bronze, i finished school early (homeschooled) and decided to play some league. My first game in champ select said the champ i chose lee sin is garbage and went on to check my lolking and tell me how im bad. I muted him and ganked top and bot starting out with 2 kills. I got a double kill bot lane. I made some really nice plays, but it came to my attention the one who was telling me i was bad was just feeding. They stood there laughing in teamfights and let us die. he was the adc so it was a pretty big deal. Any how we lost. My next game it looked good i got jungle again and tried to camp bot. I got a double and really felt like i could carry. I stole 2 of the 3 drags (idk how). I was always focus on ganking bot and mid. My top laner completely fed teemo complained how i never ganked. When i was going to gank, drag was up in 30 seconds Instead of playing safe and hugging tower. He afk'd then came back to tell me how bad i was. Yesterday i played 2 games last night, 1 i had a nice game but the other, once again we had an afk and no matter what i did we didnt win. Im allright with losing fair games and seeing where i can better. But all my friends are silver so they make fun of me for being bronze, i cant carry because of these trolls and afks i have no control over. Then when people talk to me they check my match history and see i feed, because no matter what i do, its not enough and i just die. What do i do, can i have any tips?