THIS IS WHY YOU DONT GANK WITH HALF HEALTH League of Legends

Let's rephrase this:

This is why you don't gank at half-health when you are 3 levels behind the enemy laner who is already massively ahead of your teammate.

This was a huge fail on Lee's part, just Vi taking advantage of a really bad move by the jungler.

I wish I could capture the glow in my eyes when I see a low health jungler try to gank me when im playing

This is why you don't fight/gank with that many minons to kick your teeth in... just besides every other error here. If you miss Q, leave.

Lol a good Lee Sin should easily be able to W to a minion instead of missing Q, kick you into the turret and away from the dozens of minions+closer to teammate who can dash to you and stun you under tower, Q over to you while you're stunned and kill you while taking minimal damage. Not just walk up to you and hump your leg as you use all your abilities on him.

This had nothing to do with how much health they had or even how far ahead you already were, they literally just walked up to you and let you bash their faces in. Irelia even pulled off the flash away while ignited at 1% health and minions aggroed.

The least Lee could have done was take the Q to the freaking minion that he hit!!