I'm not sure how it is now but the bots had very precise scripts way back when. E.g. Veigar bot would only walk towards you if he could combo you and he would with precise E W Q R. If he ran away he could not OTK you. EDIT: Banshee's Veil would confuse him and he'd try to OTK you and not succeed leading to free kills. This was very useful in the doom bots of doom to win at level 100. TL;DR the bots have scripts to layer CC and time things like...well robots.
This thread was added on July 16, 2021, with posts from NovaAsterix.
Original Post
https://v.redd.it/1zcf5ee4rhb71
Dude remember the fucking fiddle bot from back in the day with Twisted Treeline, fucker knew how to 1v3 OHKO. The damn thing was a nightmare. And the Karthus that always knew when he could ult you and you had no chance of living.
That's the kind of scripts I'm talking about! It really goes to show the value in "knowing your lines" like when a better player kills you and lives with 10HP, it's not luck, it's that they knew they'd live.