TFT is a total scam, it's not RNG, and you are being conned.
This is the worst attempt at hiding a pc algorithm in a "RNG" game I've ever seen. If you are not picked to win the round, you'll see all kinds of BS "RNG" happening. Need one more yasuo and no one is picking him? Good luck. How about that guy that somehow has 20 items and you keep getting shitty 2-3 gold coins? Ever see your champs suddenly change targets before killing an enemy unit? Last but best: Are you beating the odds and might win even though you aren't chosen to be the victor? Well FUCK YOU, the computer is going to spawn an NPC army that is going to have non-consensual butt sex with your little legend. You lose anyway! harrr harrr.
Seriously Riot.