I have a few tips,
#1 pick garen
#2 buy black cleaver
#3 buy tanky items, the more hp/amour the better!
#4 do more fucking damage than any adc in the fucking unbalanced game and ruin promos while spaming ctrl 1 to show that you really do get bullied at school
#5 get challenger
SIDE TIPS
Dont pick adc
Dont pick any supports that dont deal more damage than adc's/mid laners
Dont pick any fun champions as they dont get a chance to even fight any brainless ones
Dodge the game if you see the opponents picking any of the following:
(I may have missed a few of this list)
Garen
Riven
Zed
Yasuo
Master Yi
Vi
Teemo
Lux
Sona
Katarina
Akali
Annie
Darius
Xin Zhao
Nasus
Swain (EMP <3)
Wukong
Fiora
Leona
Corki (at the moment)
Jax
Veigar
Illaoi
Rengar
Fizz
LeBlanc
DrMundo
Shaco
Pantheon
Olaf
But to stop most of these play true alpha such as gangplank, draven and vayne
Hope this helped anyone in anyway