You can do everything right in Titan EX, Turn 6, Turn 7, Turn 8 and Turn 9 and still not get the loot you wanted.
Because it's "RNG" also. Your odds are better. Because something is going to drop, but its still random.
You are lacking the understanding of how random works and that its a staple of video games.
The Random is the time investment. Since no skill is involved.
If you want more performance based chances at a high level weapons, do coil.