It's not even RNG at that point.
If the first three creep rounds go by and I get 0 items and my opponent already has a Rapidfire and a Rageblade, then _something is fundamentally wrong with the game mode and this should have been thought of beforehand._
A Ranked game mode can't exist when the playing field isn't even for all players like that.
Check out this 3 full item Pyke screenshot taken by Krizonar. That's after just the first three creep waves.