leesin's passive grants him increased AS for 2 attacks after he uses an ability. he also gains energy from attacks when his passive is active. The passive doesn't stack, it just refreshes, so you can't get the passive bonus for more than 2 attacks. you need to use his passive to jungle properly, otherwise creeps will chunk your hp, and you run out of energy.
also @ OP
I don't rage at noobs - unless they act all uppity and indignant when I ask them to do something.
and i don't ask for much, i don't expect much from the players around my elo (1200), but i do expect you know how to ward, how to take map objectives - drag, baron, turrets.
if you're noob and you admit it, and try to get better, no worries, all good here. if you think you're hotshotgg and think you're judgement is better than someone who 'probably' knows better than you, and you choose to disagree - then I ask - who the fk do you think you are? get better at the game before you try to call the shots in a game. until then, listen to the best player on your team, and you'll not only do well, you'll actually get better, instead of derping around for 50 minutes waiting for minions to push something down.
if you're failing as ap carry cos you do no dmg in fights, i just quietly fume to myself, but i won't rage at you - you're just a fail ap that's letting the team down, and i'll write this game off and win another game later.