quick tips on Lee Sin
guess what
hes not a melee carry
stop building him glass cannon
he buys one dmg item which most of the time should be 
why?
well because once lee sin finishes the early game he transitions to mid game as a peeler for the adc or mages
lee sin should not always be front lining that is not what his kit was made for
he isnt a supeer tank
around th 25-30 mins mark lee sin should just be peeling for his carries
using his ult to knock away any threats that dive on his team
using his W to stop people from dyiung or shielding dmg
usingt his q to last hit enemy champs or just catch a squihsy out of place
stop playing lee sin like he was master yi or something he is not carrying games