The current "1000 HP per basic attack" meta makes Lee Sin useless

Well then go to a doctor because you are hallucinating.

With the items you listed, the twitch would have around 260 ad.

Now even if he crit every auto, that would still equal to about 575 per auto.

So either

A. You are bullshitting us and are expecting us to believe everything you say like you are the second coming

Or

B. You are hallucinating and need medical attention fast

But I'm not talking out of my ass. I main the champion you're complaining about. He doesn't do that much damage per auto.

Let's just do some math here. At level 11, he has 81.97 base AD. Add in the AD from IE and a BF Sword, the only items in that build that give him AD, and he would have 191.97 AD. Slap in 9 AD reds, and you're at 200.47. Natural Talent would be another 10.3 AD, so 210.77. Double Edged Sword would be 6.3231 damage per hit, and Assassin would be 4.2154 damage per hit. The maximum damage he could have done with a standard rune page and without counting your resistances comes out to be 221.3 without crits and 553.2 with crits, with a 50% chance to crit. This is assuming that he's dealing true damage to you, which he isn't. At level 11, you would have had 73.916 armor just off of bases and your 9 armor yellows that you should be running. He would've cut through 7% of that with masteries, so you essentially had 5.17412 armor removed from that. For simplicity, I'll round it to 5.174. So your effective armor was 68.742. 68 armor would block a fair amount of his damage still, probably somewhere around 30% of it, though I'm not going to go into game and test that. So, the maximum damage he could've done to you without critting becomes 214.661 and with crits becomes 536.604. Now, this is also if he didn't activate his ult for an extra 30 AD, and to calculate that I'd have to calculate the % bonuses again and I feel like I've already wasted enough time on you. Now quit complaining, dumbass.